build(deps): bump the vhost-device group in /staging with 2 updates

Bumps the vhost-device group in /staging with 2 updates: [proc-macro2](https://github.com/dtolnay/proc-macro2) and [syn](https://github.com/dtolnay/syn).


Updates `proc-macro2` from 1.0.83 to 1.0.84
- [Release notes](https://github.com/dtolnay/proc-macro2/releases)
- [Commits](https://github.com/dtolnay/proc-macro2/compare/1.0.83...1.0.84)

Updates `syn` from 2.0.65 to 2.0.66
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/2.0.65...2.0.66)

---
updated-dependencies:
- dependency-name: proc-macro2
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: vhost-device
- dependency-name: syn
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: vhost-device
...

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

staging/Cargo.lock

@@ -445,9 +445,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.83"
+version = "1.0.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b33eb56c327dec362a9e55b3ad14f9d2f0904fb5a5b03b513ab5465399e9f43"
+checksum = "ec96c6a92621310b51366f1e28d05ef11489516e93be030060e5fc12024a49d6"
 dependencies = [
  "unicode-ident",
 ]
@@ -570,9 +570,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
-version = "2.0.65"
+version = "2.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2863d96a84c6439701d7a38f9de935ec562c8832cc55d1dde0f513b52fad106"
+checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
 dependencies = [
  "proc-macro2",
  "quote",