Update dependency google-protobuf to v4.28.0 #48

	name: Check Example

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	check_docker_build:
	runs-on: ubuntu-latest
	name: Check Docker Build
	steps:
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Build
	uses: docker/build-push-action@v6
	with:
	context: ./example/multiple_package/server
	push: false
	cache-from: type=gha
	cache-to: type=gha,mode=max

	check_make_protoc:
	runs-on: ubuntu-latest
	name: Check `make protoc`
	steps:
	- name: Install Protoc
	uses: arduino/setup-protoc@v3
	with:
	version: "27.x"
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: '1.23'
	- uses: ruby/setup-ruby@v1
	with:
	working-directory: example/multiple_package/
	- name: Install grpc_tools_ruby_protoc
	run: gem install grpc-tools
	- name: Check
	run: cd example/multiple_package/ && make protoc && git diff --exit-code

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