fix(document): fix import file naming

re #13909

Author: hasezoey

lib/document.js

@@ -3570,7 +3570,7 @@ Document.prototype.$__getArrayPathsToValidate = function() {
 
 Document.prototype.$getAllSubdocs = function() {
   DocumentArray || (DocumentArray = require('./types/documentArray'));
-  Embedded = Embedded || require('./types/ArraySubdocument');
+  Embedded = Embedded || require('./types/arraySubdocument');
 
   function docReducer(doc, seed, path) {
     let val = doc;