How to "groupBy" PRs that don't have the labels at the end?

I don't want to specify every label, and some PRs don't need to have labels but should still be included in the release.

There doesn't seem to be a way to do that currently.

issue 中没有指定文件或测试。首先定位 release-note 分组和 groupBy 配置入口，然后跟踪当前如何处理没有标签的 pull request。完成的标准是：用户可以省略完整的标签列表，同时仍然包含没有标签的 pull request，并且对这种行为有文档说明，同时覆盖有标签和无标签两种情况。

由索引模型根据 Issue 内容生成。