fix: link to zkstack quickstart (#445)

Author: sarahschwartz

content/10.zk-stack/00.index.md

@@ -19,7 +19,7 @@ All ZKsync chains in the ecosystem share users & liquidity.
   ---
   title: Quickstart
   icon: i-heroicons-rocket-launch-solid
-  to: /zk-stack/running
+  to: /zk-stack/running/quickstart
   ---
   Run your own ZKsync chain using ZKsync Stack tooling.
   ::