fix: resolve hydrogen 404s with link update and redirect

- Update Cloudflare index to point hydrogen link to correct page
- Add redirect from old hydrogen URL to current hydrogen-react-router page

This resolves 404 alerts for /platforms/javascript/guides/cloudflare/frameworks/hydrogen/

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: codyde

docs/platforms/javascript/guides/cloudflare/index.mdx

@@ -13,7 +13,7 @@ Use this guide for general instructions on using the Sentry SDK with Cloudflare.
 
 - **[Astro](frameworks/astro/)**
 - **[Hono](frameworks/hono/)**
-- **[Hydrogen](frameworks/hydrogen/)**
+- **[Hydrogen](frameworks/hydrogen-react-router/)**
 - **[Nuxt](frameworks/nuxt/)**
 - **[Remix](frameworks/remix/)**
 - **[SvelteKit](frameworks/sveltekit/)**

redirects.js

@@ -740,6 +740,10 @@ const userDocsRedirects = [
     source: '/platforms/javascript/guides/remix/frameworks/hydrogen/',
     destination: '/platforms/javascript/guides/cloudflare/frameworks/hydrogen-react-router/',
   },
+  {
+    source: '/platforms/javascript/guides/cloudflare/frameworks/hydrogen/',
+    destination: '/platforms/javascript/guides/cloudflare/frameworks/hydrogen-react-router/',
+  },
   {
     source: '/product/metrics/:path*',
     destination: '/product/explore/metrics/:path*',