There is a new pull request by mhmdanas against master on the void-packages repository

https://github.com/mhmdanas/void-packages mupdf-1.23.6
https://github.com/void-linux/void-packages/pull/47324

mupdf: update to 1.23.6.
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#### Testing the changes
- I tested the changes in this PR: **briefly** (tested both zathura-pdf-mupdf and sioyek)

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A patch file from https://github.com/void-linux/void-packages/pull/47324.patch is attached