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

glibc: update to 2.39.
https://github.com/void-linux/void-packages/pull/49163

Description:
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#### Testing the changes
- I tested the changes in this PR: **briefly**

[ci skip]

Depends on: https://github.com/void-linux/void-packages/pull/49146
See: https://github.com/void-linux/void-packages/issues/49162

No major packaging changes indicated by upstream:
https://sourceware.org/glibc/wiki/Release/2.39
https://lists.gnu.org/archive/html/info-gnu/2024-01/msg00017.html

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