Bump actions/checkout from 2.4.0 to 3 (#193)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.4.0...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  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/ci.yaml

@@ -19,7 +19,7 @@ jobs:
         go-version: 1.17.x
       id: go
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v2.4.0
+      uses: actions/checkout@v3
     - name: Get dependencies
       run: |
         go get -v -t -d ./...