Bump actions/checkout from 2.3.2 to 2.3.4 (#19)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.2 to 2.3.4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2.3.2...v2.3.4)

Signed-off-by: dependabot[bot] <[email protected]>

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

.github/workflows/docker.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code into the Go module directory
-        uses: actions/[email protected].2
+        uses: actions/[email protected].4
 
       - name: Build and push Docker images
         uses: docker/[email protected]

.github/workflows/go.yml

@@ -12,7 +12,7 @@ jobs:
           go-version: 1.14.x
 
       - name: Check out code into the Go module directory
-        uses: actions/[email protected].2
+        uses: actions/[email protected].4
 
       - name: Cache go module
         uses: actions/cache@v2