Upgrade github java action version.

Author: davewichers

.github/workflows/maven.yaml

@@ -12,7 +12,7 @@ jobs:
       with:
         fetch-depth: 0
     - name: Set up JDK 8
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
         java-version: '8'
         distribution: 'zulu'