There is an updated pull request by xaverh against master on the void-packages repository

https://github.com/xaverh/void-packages master
https://github.com/void-linux/void-packages/pull/32365

herbstluftwm: update to 0.9.3
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#### General
- [ ] This is a new package and it conforms to the [quality requirements](https://github.com/void-linux/void-packages/blob/master/Manual.md#quality-requirements)

#### Have the results of the proposed changes been tested?
- [x] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
- [ ] I generally don't use the affected packages but briefly tested this PR

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The new dependency to libXrender-devel is mentioned in upstream's changelog.

A patch file from https://github.com/void-linux/void-packages/pull/32365.patch is attached