Update maven.yml

Author: tomasalias

.github/workflows/maven.yml

@@ -32,7 +32,7 @@ jobs:
         mvn -B package --file pom.xml
         mkdir staging && cp target/*.jar staging
     - name: Persist workflow data as artifacts
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: github-actions-artifacts
         path: staging