docs: Update menu-item with new position props (#14465)

* docs: Update menu-item with new position props

* 📦 Update electron-typescript-definitions

docs/api/menu-item.md

@@ -27,14 +27,24 @@ See [`Menu`](menu.md) for examples.
   * `visible` Boolean (optional) - If false, the menu item will be entirely hidden.
   * `checked` Boolean (optional) - Should only be specified for `checkbox` or `radio` type
     menu items.
-  * `submenu` (MenuItemConstructorOptions[] | [Menu](menu.md)) (optional) - Should be specified for `submenu` type menu items. If
-    `submenu` is specified, the `type: 'submenu'` can be omitted. If the value
-    is not a [`Menu`](menu.md) then it will be automatically converted to one using
+  * `submenu` (MenuItemConstructorOptions[] | [Menu](menu.md)) (optional) - Should be specified
+    for `submenu` type menu items. If `submenu` is specified, the `type: 'submenu'` can be omitted.
+    If the value is not a [`Menu`](menu.md) then it will be automatically converted to one using
     `Menu.buildFromTemplate`.
   * `id` String (optional) - Unique within a single menu. If defined then it can be used
     as a reference to this item by the position attribute.
-  * `position` String (optional) - This field allows fine-grained definition of the
-    specific location within a given menu.
+  * `before` String[] (optional) - Inserts this item before the item with the specified label. If
+    the referenced item doesn't exist the item will be inserted at the end of  the menu. Also implies
+    that the menu item in question should be placed in the same “group” as the item.
+  * `after` String[] (optional) - Inserts this item after the item with the specified label. If the
+    referenced item doesn't exist the item will be inserted at the end of
+    the menu.
+  * `beforeGroupContaining` String[] (optional) - Provides a means for a single context menu to declare
+    the placement of their containing group before the containing group of the item
+    with the specified label.
+  * `afterGroupContaining` String[] (optional) - Provides a means for a single context menu to declare
+    the placement of their containing group after the containing group of the item
+    with the specified label.
 
 ### Roles