🐛(backend) fix bucket access in the tilt stack

S3 username was desynchronized with the helmfile. Leading to error,
when patching object or saving any update to the Minio bucket.

@rouja fixed it.

Author: lebaudantoine

src/helm/env.d/dev/values.impress.yaml.gotmpl

@@ -47,7 +47,7 @@ backend:
     POSTGRES_PASSWORD: pass
     REDIS_URL: redis://default:pass@redis-master:6379/1
     AWS_S3_ENDPOINT_URL: http://minio.impress.svc.cluster.local:9000
-    AWS_S3_ACCESS_KEY_ID: impress
+    AWS_S3_ACCESS_KEY_ID: root
     AWS_S3_SECRET_ACCESS_KEY: password
     AWS_STORAGE_BUCKET_NAME: impress-media-storage
     STORAGES_STATICFILES_BACKEND: django.contrib.staticfiles.storage.StaticFilesStorage