create the directory at the start

.github/workflows/caches_cron_job.yml

@@ -49,6 +49,9 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: '3.10'
+      - name: Create the directory to store the data
+        run: |
+          mkdir --parents --verbose $HOME/spikeinterface_datasets/ephy_testing_data/
       - name: Get current hash (SHA) of the ephy_testing_data repo 
         id: repo_hash
         run: |
@@ -78,7 +81,6 @@ jobs:
       - name: Move the downloaded data to the right directory
         if: steps.cache-datasets.outputs.cache-hit != 'true'
         run: |
-          mkdir --parents --verbose $HOME/spikeinterface_datasets/ephy_testing_data/
           mv --force ./ephy_testing_data $HOME/spikeinterface_datasets/
       - name: Show size of the cache to assert data is downloaded
         run: |