a-range-picker月份模式下不能选择同月

[chenqifa]

The issue which is not created via https://vuecomponent.github.io/issue-helper/ will be closed immediately.
RangePicker组件mode为['month', 'month']的情况下起始月份和结束月份不能选择同一月份

注意：不是用 https://vuecomponent.github.io/issue-helper/ 或 http://ant-design-vue.gitee.io/issue-helper/ 创建的 issue 会被立即关闭。

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[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.