Clarify if py_wheel only supports pure Python wheels

According to https://github.com/bazel-contrib/rules_python/blob/a4b946bbe1b3e83ca4602a0d059fea823b0ded65/python/packaging.bzl#L102, py_wheel only supports pure python wheels.

However, looking around it seems to me that this comment is outdated, so I thought I'd ask if this is still up to date.

Thank you!

阅读 python/packaging.bzl 第 102 行附近的内容，并跟踪当前的 py_wheel 行为，以确定 pure-Python 限制是否仍然准确。完成的标准是：其中清楚地记录所支持的 wheel 类型；如果调查显示注释已经过时，则修正该注释。

由索引模型根据 Issue 内容生成。