bump protoc-gen-go-grpc to 1.2.0

Author: alessio-perugini

.github/workflows/check-protobuf-task.yml

@@ -67,7 +67,7 @@ jobs:
       - name: Install Go deps
         run: |
           go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.26.0
-          go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1.0
+          go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.2.0
 
       - name: Install Task
         uses: arduino/setup-task@v1