fix: use correct 'pasteandmatchstyle' shortcut on macOS (electron#24153)

Author: str4nge-4ttr4ctor

lib/browser/api/menu-item-roles.js

@@ -71,7 +71,7 @@ const roles = {
   },
   pasteandmatchstyle: {
     label: 'Paste and Match Style',
-    accelerator: 'Shift+CommandOrControl+V',
+    accelerator: isMac ? 'Cmd+Option+Shift+V' : 'Shift+CommandOrControl+V',
     webContentsMethod: 'pasteAndMatchStyle',
     registerAccelerator: false
   },