chore(deps): update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
       - name: Set up JDK 11
         uses: actions/setup-java@v3
         with: