Update check-jupyter-wip.yml

Author: furniturewalatkNIH

.github/workflows/check-jupyter-wip.yml

@@ -16,6 +16,8 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
+      with:
+        ref: notebook-testing-taher
 
     - name: Set up Python
       uses: actions/setup-python@v2