Fix. Github actions version upgrade

Author: mohan-13

.github/workflows/build_and_upload.yml

@@ -31,7 +31,7 @@ jobs:
     - name: Build with Maven
       run: mvn clean install
     - run: mkdir staging && cp omod/target/*.omod staging
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v4
       with:
         name: Package
         path: staging