refresh data/cutouts folders cache every week

.github/workflows/ci.yaml

@@ -72,10 +72,12 @@ jobs:
           path: |
             data
             cutouts
-          key: data-cutouts-${{ env.DATA_CACHE_NUMBER }}
+          key: data-cutouts-${{ env.WEEK }}-${{ env.DATA_CACHE_NUMBER }}
 
-      - name: Set cache date
-        run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV
+      - name: Set cache dates
+        run: |
+          echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV
+          echo "WEEK=$(date +'%Y%U')" >> $GITHUB_ENV
 
       - name: Create environment cache
         uses: actions/cache@v2