Bump redis image

Author: amercader

.github/workflows/test.yml

@@ -50,7 +50,7 @@ jobs:
           POSTGRES_DB: postgres
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
       redis:
-        image: redis:3
+        image: redis:7
     env:
       CKAN_SQLALCHEMY_URL: postgresql://ckan_default:pass@postgres/ckan_test
       CKAN_DATASTORE_WRITE_URL: postgresql://datastore_write:pass@postgres/datastore_test