There's a merged pull request on the void-packages repository

Waybar: update to 0.9.8.
https://github.com/void-linux/void-packages/pull/32584

Description:
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- [ ] 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)

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- [x] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
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cc @ericonr. I needed libxkbregistry in order to build master waybar so I thought I'd go ahead and bump the void package as well. Looks like the patch for fmt 8.0.0 has been upstreamed which is nice :)