Update websockets.mdx (cloudflare#18907)

correct misspelled word.

Author: kevcpe

src/content/docs/network/websockets.mdx

@@ -62,7 +62,7 @@ Once a WebSocket connection is closed, you can view your aggregated WebSocket us
 
 When Cloudflare releases new code to its global network, we may restart servers, which terminates WebSockets connections.
 
-### Best practises
+### Best practices
 
 - Implement a [keepalive](https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#pings_and_pongs_the_heartbeat_of_websockets).
 - Review and then remove or extend timeout settings on the origin and/or on the client.