Bump actions/checkout from 2.3.4 to 2.4.0 (#167)

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

Author: dependabot[bot]

.github/workflows/cd.yml

@@ -43,7 +43,7 @@ jobs:
     if: needs.validate.outputs.should_release == 'true'
     steps:
     - name: Check out
-      uses: actions/checkout@v2.3.4
+      uses: actions/checkout@v2.4.0
       with:
         fetch-depth: 0
     - name: Set up JDK 8