Bump protobuf from 5.27.4 to 5.28.0

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 5.27.4 to 5.28.0.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v5.27.4...v5.28.0)

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

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

requirements.txt

@@ -30,7 +30,7 @@ numpy==2.1.0
 Pillow==10.4.0
 praw==7.7.1
 prawcore==2.4.0
-protobuf==5.27.4
+protobuf==5.28.0
 prsaw==0.4.0
 pyasn1==0.6.0
 pyasn1-modules==0.4.0