Bump actions/setup-go from 2 to 4

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 2 to 4.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](https://github.com/actions/setup-go/compare/v2...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>

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-go@v2
+    - uses: actions/setup-go@v4
       with:
         go-version: '1.20'
     - run: go version