chore: update comment

Co-authored-by: Nitin Kumar <[email protected]>

Author: anshumanv

lib/Server.js

@@ -36,7 +36,7 @@ class Server {
     this.staticWatchers = [];
     // Keep track of websocket proxies for external websocket upgrade.
     this.webSocketProxies = [];
-    // this value of ws can be overwritten for tests
+    // this value of web socket can be overwritten for tests
     this.webSocketHeartbeatInterval = 30000;
 
     normalizeOptions(this.compiler, this.options, this.logger);