Revert "build(deps): bump helmet from 4.4.1 to 5.0.1"

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/auth-backend/package.json

@@ -47,7 +47,7 @@
     "express-session": "^1.17.1",
     "fs-extra": "9.1.0",
     "google-auth-library": "^7.6.1",
-    "helmet": "^5.0.1",
+    "helmet": "^4.0.0",
     "jose": "^1.27.1",
     "jwt-decode": "^3.1.0",
     "knex": "^0.95.1",