actions: use go-version-file: .go-version

 see actions/setup-go#295

.github/workflows/golangci-lint.yml

@@ -23,14 +23,9 @@ jobs:
 
       - uses: actions/checkout@v3
 
-      # Uses Go version from the repository.
-      - name: Read .go-version file
-        id: goversion
-        run: echo "::set-output name=version::$(cat .go-version)"
-
       - uses: actions/setup-go@v3
         with:
-          go-version: "${{ steps.goversion.outputs.version }}"
+          go-version-file: .go-version
 
       - name: golangci-lint
         env:
@@ -50,4 +45,4 @@ jobs:
           args: --timeout=30m --whole-files
 
           # Optional: show only new issues if it's a pull request. The default value is `false`.
-          only-new-issues: true
+          only-new-issues: true