Bump actions/setup-go from 2 to 6

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 2 to 6.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](https://github.com/actions/setup-go/compare/v2...v6)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci-test.yaml

@@ -12,7 +12,7 @@ jobs:
     - name: install libpcap
       run: sudo apt-get install libpcap-dev -y
     - name: install Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v6
       with:
         go-version: ${{ matrix.go-version }}
     - name: checkout code