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

zlib: Set homepage to https
https://github.com/void-linux/void-packages/pull/36719

Description:
zlib could not be fetched from the old http homepage. Only the https site works now.

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

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- I built this PR locally for my native architecture, (x86_64-musl)
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Fixes https://github.com/void-linux/void-packages/issues/36720.