fix: rename Realtime Kit to RealtimeKit

Co-authored-by: Harsh Shandilya <[email protected]>

Author: roerohan

src/content/docs/realtime/index.mdx

@@ -24,7 +24,7 @@ Build Realtime apps with lowest latency - at any scale!
 
 Cloudflare Realtime is a comprehensive suite of products designed to help you build powerful, scalable real-time applications. It has three main offerings:
 
-### Realtime Kit
+### RealtimeKit
 
 Cloudflare [RealtimeKit](./introduction) allows you to integrate programmable and easily customizable live video and voice into your web, mobile, and desktop applications. With just a few lines of code, you can enable live video communication, voice calls, and interactive live streaming.