chore(deps-dev): bump protobuf in /_integration-tests/utils/agent

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 5.29.1 to 5.29.2.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v5.29.1...v5.29.2)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

_integration-tests/utils/agent/requirements-dev.txt

@@ -13,7 +13,7 @@ idna==3.10
 msgpack==1.1.0
 multidict==6.1.0
 propcache==0.2.1
-protobuf==5.29.1
+protobuf==5.29.2
 requests==2.32.3
 six==1.17.0
 typing_extensions==4.12.2