Update actions/setup-java action to v6

Author: renovate[bot]

.github/workflows/mvntest.yml

@@ -9,7 +9,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
       - name: Set up JDK 17
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@v6
         with:
           java-version: '17'
           distribution: 'temurin'