Add 'torchrec' entry to 404.html (#2049)

This was missed in the original list of projects to redirect.

Author: zpao

404.html

@@ -40,6 +40,7 @@
     "text",
     "live-website",
     "live-old",
+    "torchrec",
     // Temporary test entries
     "tritonparse",
     "monarch",
@@ -115,4 +116,4 @@ <h4>
   <h4>
     Click <a href="/">here</a> to go back to the main page.
   </h4>
-</div>
+</div>