Update django-test.yml

Author: dangannn

.github/workflows/django-test.yml

@@ -32,7 +32,7 @@ jobs:
 
       - name: cache deps
         id: cache-deps
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: .venv
           key: pydeps-${{ hashFiles('**/poetry.lock') }}