fix(deps): update dependency @google-cloud/container to v4

Signed-off-by: Renovate Bot <bot@renovateapp.com>

plugins/kubernetes-backend/package.json

@@ -41,7 +41,7 @@
     "@backstage/config": "^1.0.1",
     "@backstage/errors": "^1.0.0",
     "@backstage/plugin-kubernetes-common": "^0.3.0-next.1",
-    "@google-cloud/container": "^3.0.0",
+    "@google-cloud/container": "^4.0.0",
     "@kubernetes/client-node": "^0.16.0",
     "@types/express": "^4.17.6",
     "@types/luxon": "^2.0.4",