chore(deps): update dependency gatsby-plugin-netlify to v5

Author: renovate-bot

demo/package.json

@@ -35,7 +35,7 @@
     "download": "^8.0.0",
     "form-data": "^4.0.0",
     "fs-extra": "^10.0.0",
-    "gatsby-plugin-netlify": "^4.0.0",
+    "gatsby-plugin-netlify": "^5.0.0",
     "jest": "^27.0.0",
     "linkfs": "^2.1.0",
     "multer": "^1.4.2",