Set Github Token for setup-protoc action to mitigate occasional rate-limits in CI (#530)

Author: ansgarm

.github/workflows/ci-protobuf.yml

@@ -30,6 +30,7 @@ jobs:
           # https://github.com/protocolbuffers/protobuf repository for protoc
           # release updates.
           version: '29.3'
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
       - run: go mod download
       - run: make tools
       - run: make protoc