work around deprecated behavior

Author: keewis

.github/workflows/ci.yaml

@@ -79,13 +79,17 @@ jobs:
           python -c 'import xarray_array_testing'
 
       - name: Restore cached hypothesis directory
-        uses: actions/cache@v4
+        uses: actions/cache/restore@v4
         with:
           path: .hypothesis/
           key: cache-hypothesis
-          enableCrossOsArchive: true
-          save-always: true
 
       - name: Run tests
         run: |
           python -m pytest --cov=xarray_array_testing
+
+      - name: Cache hypothesis directory
+        uses: actions/cache/save@v4
+        with:
+          path: .hypothesis/
+          key: cache-hypothesis