fix(.github): adjust DJANGO_SETTINGS_MODULE in CI workflow

- Enhancements:
  - Align CI configuration with updated settings module location- Bug Fixes:
  - Correct misreferenced DJANGO_SETTINGS_MODULE to prevent test environment issues

.github/workflows/ci.yml

@@ -62,7 +62,7 @@ jobs:
 
     - name: Run Django tests
       env:
-        DJANGO_SETTINGS_MODULE: core.settings.development
+        DJANGO_SETTINGS_MODULE: config.settings.development
         SECRET_KEY: test-secret-key-for-ci
         ALLOWED_HOSTS: localhost
         DB_NAME: test_db
@@ -76,7 +76,7 @@ jobs:
 
     - name: Check migrations
       env:
-        DJANGO_SETTINGS_MODULE: core.settings.development
+        DJANGO_SETTINGS_MODULE: config.settings.development
         SECRET_KEY: test-secret-key-for-ci
         ALLOWED_HOSTS: localhost
         DB_NAME: test_db