fix tests with file rename

.github/workflows/python-app.yml

@@ -23,7 +23,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        wget -O SIMPLE.db https://raw.githubusercontent.com/SIMPLE-AstroDB/SIMPLE-binary/main/SIMPLE.db
+        wget -O SIMPLE.sqlite https://raw.githubusercontent.com/SIMPLE-AstroDB/SIMPLE-binary/main/SIMPLE.sqlite
     - name: Test with pytest
       run: |
         pytest -v simple_app/tests/test_plots.py