fix typo (#216)

Rename Custom to Customize.

src/translations/vnote_zh_CN.ts

@@ -3431,7 +3431,7 @@
     </message>
     <message>
         <location filename="../vmainwindow.cpp" line="1045"/>
-        <source>Custom some standard shortcuts</source>
+        <source>Customize some standard shortcuts</source>
         <translation>自定义部分标准快捷键</translation>
     </message>
     <message>

src/vmainwindow.cpp

@@ -1064,8 +1064,8 @@ void VMainWindow::initFileMenu()
 
     fileMenu->addAction(openConfigAct);
 
-    QAction *customShortcutAct = new QAction(tr("Custom Shortcuts"), this);
-    customShortcutAct->setToolTip(tr("Custom some standard shortcuts"));
+    QAction *customShortcutAct = new QAction(tr("Customize Shortcuts"), this);
+    customShortcutAct->setToolTip(tr("Customize some standard shortcuts"));
     connect(customShortcutAct, &QAction::triggered,
             this, &VMainWindow::customShortcut);