[WIP] fix pooch data cacheing

.github/workflows/ci.yaml

@@ -56,6 +56,19 @@ jobs:
         run: |
           python -Ic "import openfe_analysis; print(openfe_analysis.__version__)"
 
+      - name: Cache Pooch data
+        uses: actions/cache@v4
+        with:
+          path: |
+            # linux cache location
+            ~/.cache/openfe
+            # osx cache location
+            ~/Library/Caches/openfe
+          # When files are added or changed in a pooch registry
+          # bump this key to create a new cache, for example if 
+          # the key is pooch-${{ matrix.os }}-1 change it to pooch-${{ matrix.os }}-2
+          key: pooch-${{ matrix.os }}-1
+
       - name: "Run tests"
         run: |
           pytest -n auto -v --cov=openfe_analysis --cov-report=xml --durations=10