Bump nhsuk-eleventy-plugin (#470)

Fixes #436

Thanks @paulrobertlloyd!

Author: frankieroberto

package-lock.json

@@ -26,7 +26,7 @@
   },
   "dependencies": {
     "@11ty/eleventy": "^3.1.5",
-    "@x-govuk/nhsuk-eleventy-plugin": "^1.2.0",
+    "@x-govuk/nhsuk-eleventy-plugin": "^1.2.1",
     "http-server": "^14.1.1"
   },
   "devDependencies": {