Bump actions/setup-go from 3 to 4 (#31)

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 3 to 4.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](https://github.com/actions/setup-go/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/go.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Set up Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4
       with:
         go-version: ^1.15
     - name: Check out code