Bump protobuf from 6.32.0 to 6.33.5

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 6.32.0 to 6.33.5.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Commits](https://github.com/protocolbuffers/protobuf/commits)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-version: 6.33.5
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -38,7 +38,7 @@ opentelemetry-semantic-conventions==0.57b0
 opentelemetry-util-http==0.57b0
 packaging==25.0
 propcache==0.3.2
-protobuf==6.32.0
+protobuf==6.33.5
 pyparsing==3.2.3
 pyRdfa3==3.6.4
 pytz==2025.2