Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Set up JDK 17
         uses: actions/setup-java@v3
         with: