remove bundle size improve phrase since Idk how to properly calculate it from gatsby to next.js

Author: dimaMachina

src/pages/blog/2024-06-11-announcing-new-graphql-website/index.mdx

@@ -62,7 +62,7 @@ We migrated from Gatsby & Netlify to [Nextra](https://nextra.vercel.app) and
 [Next.js](https://nextjs.org). We chose Nextra because it's a great tool for
 building documentation websites, also [The Guild](https://the-guild.dev)
 maintains and improves it continuously. This migration helped us to improve the
-website's performance and bundle size.
+website's performance.
 
 This migration was the final part before releasing the upcoming Nextra version.
 You can read my blog post about Nextra 3 in