build: Bump bitflags from 2.5.0 to 2.6.0

Bumps [bitflags](https://github.com/bitflags/bitflags) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/bitflags/bitflags/releases)
- [Changelog](https://github.com/bitflags/bitflags/blob/main/CHANGELOG.md)
- [Commits](https://github.com/bitflags/bitflags/compare/2.5.0...2.6.0)

---
updated-dependencies:
- dependency-name: bitflags
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

devices/Cargo.toml

@@ -8,7 +8,7 @@ version = "0.1.0"
 acpi_tables = { git = "https://github.com/rust-vmm/acpi_tables", branch = "main" }
 anyhow = "1.0.86"
 arch = { path = "../arch" }
-bitflags = "2.5.0"
+bitflags = "2.6.0"
 byteorder = "1.5.0"
 event_monitor = { path = "../event_monitor" }
 hypervisor = { path = "../hypervisor" }