Update actions/checkout action to v4 (#394)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/deploy-to-github.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Check out repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Set up JDK 17
       uses: actions/setup-java@v4