Add redirect from /getting-started to /quickstart

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: petradonka

vercel.json

@@ -2176,6 +2176,11 @@
       "destination": "/terminal/sessions/",
       "statusCode": 308
     },
+    {
+      "source": "/getting-started",
+      "destination": "/quickstart/",
+      "statusCode": 308
+    },
     {
       "source": "/getting-started/account-and-login",
       "destination": "/getting-started/quickstart/installation-and-setup/",