chore(deps): update dependency gatsby-plugin-netlify to v5 (#390)

Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: 3 people

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",