Update releases.mdx

Author: ukdaaan

src/content/docs/information/releases.mdx

@@ -11,7 +11,7 @@ This page aims to cover the latest information for Java tracking the required Ja
 
  Major Release | Revision Version | Java Support | PaperMC Build | Purpur Build
 ------------ |------------ | ------------        | --------| -------- 
-1.20         | 6          | Java 17, 19          |  ✔     |  ✔ 
+1.20         | 6          | Java 17, 19, 21          |  ✔     |  ✔ 
 
 <small>If you come back to this page at a later date in time and you cannot see a build for the newest release check one of the following links for updates: <a href="https://link.setup.md/papergithub">PaperMC Github</a> or <a href="https://link.setup.md/purpurgithub">PurpurMC Github</a></small>