Bump types-protobuf from 5.29.1.20250315 to 5.29.1.20250403

Bumps [types-protobuf](https://github.com/typeshed-internal/stub_uploader) from 5.29.1.20250315 to 5.29.1.20250403.
- [Commits](https://github.com/typeshed-internal/stub_uploader/commits)

---
updated-dependencies:
- dependency-name: types-protobuf
  dependency-version: 5.29.1.20250403
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]