fix: protocol buffer のインストールスクリプトを修正

.github/workflows/ci.yml

@@ -24,6 +24,7 @@ jobs:
       - name: Install Protobuf
         run: |
           sudo apt-get update
+          sudo apt-get install -y protobuf-compiler
           go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
           export PATH="$PATH:$(go env GOPATH)/bin"