Update fn syntax in KCL Types doc (#4640)

* update fn syntax

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu-latest-8-cores)

* Trigger CI

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Jonathan Tran <jonnytran@gmail.com>

public/kcl-samples-manifest-fallback.json

@@ -149,6 +149,11 @@
     "title": "Tire",
     "description": "A tire is a critical component of a vehicle that provides the necessary traction and grip between the car and the road. It supports the vehicle's weight and absorbs shocks from road irregularities."
   },
+  {
+    "file": "wall-e.kcl",
+    "title": "WALL-E",
+    "description": "An inquisitive trash compacting robot imagined by Disney Pixar Animation Studios"
+  },
   {
     "file": "washer.kcl",
     "title": "Washer",