Update maven.yml

Author: Allen-Chen-BU

.github/workflows/maven.yml

@@ -32,8 +32,8 @@ jobs:
         cache: maven
     - name: Build with Maven
       run: mvn -B package --file pom.xml
-    - run: mkdir staging && cp target/*.jar staging
-    - uses: actions/upload-artifact@v4
+    - run: mkdir -p target/
+    - name: Download all workflow run artifacts
+      uses: actions/download-artifact@v4
       with:
-        name: Package
-        path: staging
+        path: target/