added supported bun version note

Author: isshaddad

docs/guides/frameworks/bun.mdx

@@ -14,6 +14,10 @@ import CliViewRunStep from "/snippets/step-view-run.mdx";
   Bun will still be used to execute your tasks, even in the `dev` environment.
 </Warning>
 
+<Note>
+  **Supported Bun version:** Deployed tasks run on Bun 1.3.3. For local development, use Bun 1.3.x for compatibility.
+</Note>
+
 <Prerequisites framework="Bun" />
 
 ## Known issues