Update govuk-frontend to 5.11.0

Author: owenatgov

npm-shrinkwrap.json

@@ -73,7 +73,7 @@
     "express": "^4.18.2",
     "express-session": "^1.18.0",
     "fs-extra": "^11.2.0",
-    "govuk-frontend": "5.10.2",
+    "govuk-frontend": "5.11.0",
     "inquirer": "^8.2.6",
     "lodash": "^4.17.21",
     "marked": "^4.3.0",