[FIX] web_editor, mass_mailing: use new historyReset io/ resetHistory

344d82c renamed `resetHistory` into `historyReset` but failed to update
some calls to it and rename its equivalent in wysiwyg.js. This commit
corrects the discrepancy.

Part-of: odoo/odoo#75901

addons/mass_mailing/static/src/js/mass_mailing_widget.js

@@ -527,7 +527,7 @@ var MassMailingFieldHtml = FieldHtml.extend({
             // Wait the next tick because some mutation have to be processed by
             // the Odoo editor before resetting the history.
             setTimeout(() => {
-                this.wysiwyg.resetHistory();
+                this.wysiwyg.historyReset();
             }, 0);
         });
 

addons/web_editor/static/src/js/wysiwyg/wysiwyg.js

@@ -565,8 +565,8 @@ const Wysiwyg = Widget.extend({
     /**
      * Reset the history.
      */
-    resetHistory: function () {
-        this.odooEditor.resetHistory();
+    historyReset: function () {
+        this.odooEditor.historyReset();
     },
 
     /**