Remove specific node version from title

Author: samejr

docs/upgrade-to-v4.mdx

@@ -9,7 +9,7 @@ import NodeVersions from "/snippets/node-versions.mdx";
 
 [Read our blog post](https://trigger.dev/blog/v4-beta-launch) for an overview of the new features.
 
-### Node.js 22 support
+### Node.js support
 
 <NodeVersions />