chore(deps): update dependency @netlify/plugin-gatsby to v2.1.4

Author: renovate-bot

package.json

@@ -40,7 +40,7 @@
   },
   "devDependencies": {
     "@babel/core": "7.16.7",
-    "@netlify/plugin-gatsby": "2.0.0-zz-beta.0",
+    "@netlify/plugin-gatsby": "2.1.4",
     "@types/mdx-js__react": "1.5.5",
     "@types/node": "16.11.19",
     "@types/react": "17.0.39",