Upgrade github action versions and upgrade Java to v17.

Author: Dave Wichers

.github/workflows/maven.yaml

@@ -8,13 +8,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
-    - name: Set up JDK 11
-      uses: actions/setup-java@v4
+    - name: Set up JDK 17
+      uses: actions/setup-java@v5
       with:
-        java-version: '11'
+        java-version: '17'
         distribution: 'zulu'
     - name: Run Spotless check
       run: mvn spotless:check