Bug 1626507 - pt 2. Update comment since code has moved r=mattwoodrow

Differential Revision: https://phabricator.services.mozilla.com/D80594

toolkit/modules/E10SUtils.jsm

@@ -137,7 +137,7 @@ const kDocumentChannelDeniedURIs = [
   "about:printpreview",
 ];
 
-// Changes here should also be made in URIUsesDocChannel in nsDocShell.cpp.
+// Changes here should also be made in URIUsesDocChannel in DocumentChannel.cpp.
 function documentChannelPermittedForURI(aURI) {
   return (
     !kDocumentChannelDeniedSchemes.includes(aURI.scheme) &&