chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
     - name: Set up JDK 17
       uses: actions/setup-java@v5
       with: