gha-ci: update github actions to latest versions

Update
 - actions/setup-go from v2 to v3;
 - actions/checkout from v2 to v3;
 - actions/cache from v2 to v3.0.2.

Tested at https://github.com/kolyshkin/protobuf-go/runs/6480937412

Change-Id: Ibeda7c83b1dfaf69dff1dab358b977958a48e51d
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/406846
Reviewed-by: Lasse Folger <lassefolger@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>

.github/workflows/test.yml

@@ -14,13 +14,13 @@ jobs:
       if: runner.os == 'Linux'
       run: sudo apt-get -y install autoconf automake libtool curl make g++ unzip
     - name: Install Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
         go-version: ${{ matrix.go-version }}
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Cache dependencies
-      uses: actions/cache@v2
+      uses: actions/cache@v3.0.2
       with:
         path: .cache
         key: ${{ runner.os }}-${{ hashFiles('integration_test.go') }}