Update maven.yml

Author: sgubba01

.github/workflows/maven.yml

@@ -25,7 +25,7 @@ jobs:
       run: mvn --batch-mode verify
 
     - name: Upload JAR artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: my-app-jar
         path: target/*.jar