update example

Author: jimmyn

example/package.json

@@ -9,7 +9,7 @@
     "gatsby-plugin-image": "^3.2.0",
     "gatsby-plugin-manifest": "^5.2.0",
     "gatsby-plugin-offline": "^6.2.0",
-    "gatsby-plugin-react-i18next": "^2.0.5",
+    "gatsby-plugin-react-i18next": "^3.0.1",
     "gatsby-plugin-sharp": "^5.2.0",
     "gatsby-plugin-sitemap": "^6.2.0",
     "gatsby-source-filesystem": "^5.2.0",