Bump protobuf from 5.28.2 to 5.28.3 (#983)

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 5.28.2 to 5.28.3.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v5.28.2...v5.28.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -1,3 +1,3 @@
 casttube==0.2.1
-protobuf==5.28.2
+protobuf==5.28.3
 zeroconf==0.136.0