fix: add /tutorials redirect to learn.temporal.io to fix 404s from search results (#4323)

Agent-Logs-Url: https://github.com/temporalio/documentation/sessions/e5ea5c4a-63a1-4be7-9b1a-a4bdc447459c

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: jsundai <36107423+jsundai@users.noreply.github.com>
Co-authored-by: Jwahir Sundai <jwahir.sundai@temporal.io>

Author: Copilot

vercel.json

@@ -209,6 +209,16 @@
       "destination": "https://learn.temporal.io/getting_started/php/hello_world_in_php/",
       "permanent": true
     },
+    {
+      "source": "/tutorials",
+      "destination": "https://learn.temporal.io/tutorials/",
+      "permanent": true
+    },
+    {
+      "source": "/tutorials/:path*",
+      "destination": "https://learn.temporal.io/tutorials/:path*",
+      "permanent": true
+    },
     {
       "source": "/php/booking-saga-tutorial",
       "destination": "https://learn.temporal.io/tutorials/php/booking_saga/",