Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/maven.yml

@@ -10,7 +10,7 @@ jobs:
  jdk: [ 17, 21 ]
 
  steps:
- - uses: actions/checkout@v4
+ - uses: actions/checkout@v5
  - uses: actions/setup-java@v5
  with:
  java-version: ${{matrix.jdk}}