build: bump serde from 1.0.136 to 1.0.137

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.136 to 1.0.137.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.136...v1.0.137)

---
updated-dependencies:
- dependency-name: serde
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

vmm/Cargo.toml

@@ -38,7 +38,7 @@ option_parser = { path = "../option_parser" }
 pci = { path = "../pci" }
 qcow = { path = "../qcow" }
 seccompiler = "0.2.0"
-serde = { version = "1.0.136", features = ["rc"] }
+serde = { version = "1.0.137", features = ["rc"] }
 serde_derive = "1.0.136"
 serde_json = "1.0.80"
 signal-hook = "0.3.13"