build(deps): bump the otel group with 8 updates

Bumps the otel group with 8 updates:

| Package | From | To |
| --- | --- | --- |
| [go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc](https://github.com/open-telemetry/opentelemetry-go-contrib) | `0.50.0` | `0.51.0` |
| [go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp](https://github.com/open-telemetry/opentelemetry-go-contrib) | `0.50.0` | `0.51.0` |
| [go.opentelemetry.io/otel](https://github.com/open-telemetry/opentelemetry-go) | `1.25.0` | `1.26.0` |
| [go.opentelemetry.io/otel/exporters/otlp/otlptrace](https://github.com/open-telemetry/opentelemetry-go) | `1.25.0` | `1.26.0` |
| [go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc](https://github.com/open-telemetry/opentelemetry-go) | `1.25.0` | `1.26.0` |
| [go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp](https://github.com/open-telemetry/opentelemetry-go) | `1.25.0` | `1.26.0` |
| [go.opentelemetry.io/otel/sdk](https://github.com/open-telemetry/opentelemetry-go) | `1.25.0` | `1.26.0` |
| [go.opentelemetry.io/otel/trace](https://github.com/open-telemetry/opentelemetry-go) | `1.25.0` | `1.26.0` |


Updates `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc` from 0.50.0 to 0.51.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go-contrib/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go-contrib/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go-contrib/compare/zpages/v0.50.0...zpages/v0.51.0)

Updates `go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp` from 0.50.0 to 0.51.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go-contrib/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go-contrib/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go-contrib/compare/zpages/v0.50.0...zpages/v0.51.0)

Updates `go.opentelemetry.io/otel` from 1.25.0 to 1.26.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go/compare/v1.25.0...v1.26.0)

Updates `go.opentelemetry.io/otel/exporters/otlp/otlptrace` from 1.25.0 to 1.26.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go/compare/v1.25.0...v1.26.0)

Updates `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc` from 1.25.0 to 1.26.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go/compare/v1.25.0...v1.26.0)

Updates `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp` from 1.25.0 to 1.26.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go/compare/v1.25.0...v1.26.0)

Updates `go.opentelemetry.io/otel/sdk` from 1.25.0 to 1.26.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go/compare/v1.25.0...v1.26.0)

Updates `go.opentelemetry.io/otel/trace` from 1.25.0 to 1.26.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go/compare/v1.25.0...v1.26.0)

---
updated-dependencies:
- dependency-name: go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
- dependency-name: go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
- dependency-name: go.opentelemetry.io/otel
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
- dependency-name: go.opentelemetry.io/otel/exporters/otlp/otlptrace
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
- dependency-name: go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
- dependency-name: go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
- dependency-name: go.opentelemetry.io/otel/sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
- dependency-name: go.opentelemetry.io/otel/trace
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: otel
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/fieldmask.go

@@ -41,7 +41,7 @@ func FieldMaskFromRequestBody(r io.Reader, msg proto.Message) (*field_mask.Field
 
 		m, ok := item.node.(map[string]interface{})
 		switch {
-		case ok:
+		case ok && len(m) > 0:
 			// if the item is an object, then enqueue all of its children
 			for k, v := range m {
 				if item.msg == nil {
@@ -96,6 +96,8 @@ func FieldMaskFromRequestBody(r io.Reader, msg proto.Message) (*field_mask.Field
 					queue = append(queue, child)
 				}
 			}
+		case ok && len(m) == 0:
+			fallthrough
 		case len(item.path) > 0:
 			// otherwise, it's a leaf node so print its path
 			fm.Paths = append(fm.Paths, item.path)