Update GitHub Actions workflow to use Redis 7 and actions/checkout@v5

Author: MarkCalvert

.github/workflows/test.yml

@@ -22,7 +22,7 @@ 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
@@ -31,7 +31,7 @@ jobs:
       CKAN_REDIS_URL: redis://redis:6379/1
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v5
     - name: Install requirements
       run: |
         pip install -e .