Update test_changed_notebooks.yaml

Author: robbibt

.github/workflows/test_changed_notebooks.yaml

@@ -13,7 +13,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
       with:
-        fetch-depth: 10
+        fetch-depth: 25
 
     # - name: Set up Python
     #   uses: actions/setup-python@v4