fix: change roomname prefix from 'codemirror' to 'quill'

Author: lawvs

quill/quill.js

@@ -7,7 +7,7 @@ import Quill from 'quill'
 import QuillCursors from 'quill-cursors'
 
 Quill.register('modules/cursors', QuillCursors)
-const roomname = `codemirror-demo-${new Date().toLocaleDateString('en-CA')}`
+const roomname = `quill-demo-${new Date().toLocaleDateString('en-CA')}`
 
 window.addEventListener('load', () => {
   const ydoc = new Y.Doc()