docs(cloud): fix broken link in Developer Playground documentation (cube-js#5312)

Author: Remy-T

docs/content/Cube-Cloud/Developer-Tools/Developer-Playground.md

@@ -26,4 +26,4 @@ API will restart and its status will be visible in the Playground:
   />
 </div>
 
-[ref-devtools-ide]: /cloud/cube-ide
+[ref-devtools-ide]: /cloud/dev-tools/cube-ide