DOC-3504: Add redirect from /docs/tinymce/5/react-cloud/ to /docs/tinymce/5/react/ (#4132)

The react-cloud page does not exist in TinyMCE 5 docs, causing 404s.
Redirect visitors to the correct versioned React integration page.

Author: kemister85

redirects.json

@@ -2312,6 +2312,10 @@
     "location": "/docs/tinymce/5/integrations/laravel/laravel-zip-install/",
     "redirect": "/docs/tinymce/5/"
   },
+  {
+    "location": "/docs/tinymce/5/react-cloud/",
+    "redirect": "/docs/tinymce/5/react/"
+  },
   {
     "location": "/docs/tinymce/5/integrations/react/",
     "redirect": "/docs/tinymce/5/"