feat: upgrade to MDX v2 (#8288)

Co-authored-by: Armano <armano2@users.noreply.github.com>

website/versioned_docs/version-2.3.1/introduction.mdx

@@ -53,9 +53,10 @@ In this presentation at [Algolia Community Event](https://www.algolia.com/), [Me
 ```mdx-code-block
 import LiteYouTubeEmbed from 'react-lite-youtube-embed';
 
+{/* cSpell:ignore Yhyx Sksg */}
+
 <div className="video-container">
   <LiteYouTubeEmbed
-    // cSpell:ignore Yhyx Sksg
     id="Yhyx7otSksg"
     params="autoplay=1&autohide=1&showinfo=0&rel=0"
     title="Docusaurus: Documentation Made Easy"
@@ -129,18 +130,6 @@ Docusaurus 2 is born to be compassionately accessible to all your users, and lig
 
 We believe that, as developers, knowing how a library works helps us become better at using it. Hence we're dedicating effort to explaining the architecture and various components of Docusaurus with the hope that users reading it will gain a deeper understanding of the tool and be even more proficient in using it.
 
-<!--
-
-Explain the principles that guide the development of Docusaurus.
-
-References
----
-- https://www.gatsbyjs.org/docs/behind-the-scenes/
-- https://reactjs.org/docs/design-principles.html
-- https://v1.vuepress.vuejs.org/miscellaneous/design-concepts.html
-
--->
-
 ## Comparison with other tools {#comparison-with-other-tools}
 
 Across all static site generators, Docusaurus has a unique focus on documentation sites and has many out-of-the-box features.