chore(deps): bump packaging from 20.9 to 21.3 in /gcp/api

Bumps [packaging](https://github.com/pypa/packaging) from 20.9 to 21.3.
- [Release notes](https://github.com/pypa/packaging/releases)
- [Changelog](https://github.com/pypa/packaging/blob/main/CHANGELOG.rst)
- [Commits](pypa/packaging@20.9...21.3)

---
updated-dependencies:
- dependency-name: packaging
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gcp/api/poetry.lock

@@ -8,7 +8,7 @@ python = "^3.11"
 google-cloud-ndb = "==2.3.2"
 google-cloud-logging = "==3.11.3"
 packageurl-python = "==0.16.0"
-packaging = "==20.9"
+packaging = "==21.3"
 requests = "==2.32.3"
 grpcio = "==1.64.1"
 grpcio-reflection = "==1.62.2"