Fix typo in websocket doc (#35393)

Signed-off-by: Gustav <[email protected]>

Author: gustaavv

framework-docs/modules/ROOT/pages/web/websocket/stomp/configuration-performance.adoc

@@ -72,7 +72,7 @@ such as https://github.com/stomp-js/stompjs[`stomp-js/stompjs`] and others split
 STOMP messages at 16K boundaries and send them as multiple WebSocket messages,
 which requires the server to buffer and re-assemble.
 
-Spring's STOMP-over-WebSocket support does this ,so applications can configure the
+Spring's STOMP-over-WebSocket support does this, so applications can configure the
 maximum size for STOMP messages irrespective of WebSocket server-specific message
 sizes. Keep in mind that the WebSocket message size is automatically
 adjusted, if necessary, to ensure they can carry 16K WebSocket messages at a