There is an updated pull request by oreo639 against master on the void-packages repository

https://github.com/oreo639/void-packages libxml2
https://github.com/void-linux/void-packages/pull/48826

libxml2: update to 2.12.5.
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#### Testing the changes
- I tested the changes in this PR: **briefly**

I tested building all packages depending on libxml2.
~~The only other build failure not addressed is vtk, which is gcc 13 related.~~
This depends on https://github.com/void-linux/void-packages/pull/48824

cc: @classabbyamp 

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A patch file from https://github.com/void-linux/void-packages/pull/48826.patch is attached