docs: fix "procesing" -> "processing" in realtime examples

[mini-peanut]

Description

This PR fixes a typo in the realtime WebSocket examples and documentation where "procesing" is corrected to "processing" in the error handler comment.

The typo was present in:

• realtime.md (lines 41 and 82)
• examples/realtime/websocket.ts
• examples/realtime/ws.ts
• examples/azure/realtime/websocket.ts
• examples/azure/realtime/ws.ts

Changes

Fixed the typo in the comment:

// in a real world scenario this should be logged somewhere as you
- // likely want to continue procesing events regardless of any errors
+ // likely want to continue processing events regardless of any errors