add build pipeline package

Author: jinliu9508

.github/workflows/create-release-pr.yml

@@ -80,6 +80,12 @@ jobs:
         with:
           version-file: 'OneSignalExample/ProjectSettings/ProjectVersion.txt'
 
+      - name: Add Build Pipeline Package
+        working-directory: OneSignalExample
+        run: |
+          npm install -g openupm-cli
+          openupm add com.virtualmaker.buildalon
+
       # need to activate the Unity license to run Unity in batchmode; required for exportPackage
       - uses: buildalon/activate-unity-license@v2
         with: