fix: register websockets page in docs table of contents

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bartlomieju

docs/toc.ts

@@ -107,6 +107,7 @@ const toc: RawTableOfContents = {
           ],
           ["active-links", "Active links", "link:latest"],
           ["session-management", "Session management", "link:latest"],
+          ["websockets", "WebSockets", "link:latest"],
           ["common-patterns", "Common Patterns", "link:latest"],
         ],
       },