chore(deps): bump protobuf in /src/shoppingassistantservice (#3240)

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 6.32.1 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: indirect
...

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Author: dependabot[bot]

src/shoppingassistantservice/requirements.txt

@@ -168,7 +168,7 @@ proto-plus==1.26.1
     #   google-api-core
     #   google-cloud-alloydb
     #   google-cloud-secret-manager
-protobuf==6.32.1
+protobuf==6.33.5
     # via
     #   google-api-core
     #   google-cloud-alloydb