Update upm.yaml

Update upm.yaml

Author: keveleigh

.github/workflows/upm.yaml

@@ -27,6 +27,16 @@ jobs:
       shell: pwsh
 
     - uses: actions/upload-artifact@v4
+      if: github.event_name == 'pull_request'
       with:
+        name: packages
         path: ${{ github.workspace }}/build/upm/output
         retention-days: 1
+
+        
+    - uses: actions/upload-artifact@v4
+      if: github.event_name == 'push'
+      with:
+        name: packages
+        path: ${{ github.workspace }}/build/upm/output
+        retention-days: 15