Maybe fix bikeshed error; at least silencing it for now.

Author: dhil

document/js-api/index.bs

@@ -1302,7 +1302,7 @@ The internal methods of an [=Exported GC Object=] use the following implementati
     1. Return keys.
 </div>
 
-<div algorithm>
+<div algorithm="gc">
   To create <dfn>a new Exported GC Object</dfn> from a WebAssembly [=object address=] |objectaddr| and a string |objectkind|, perform the following steps:
 
     1. Assert: |objectkind| is either "array" or "struct".