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

rtx: rename to mise, update to 2024.1.4.
https://github.com/void-linux/void-packages/pull/48060

Description:
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#### Testing the changes
- I tested the changes in this PR: **briefly** - the `mise` CLI runs, `mise doctor` correctly understood that I had not set up the zsh hooks yet, evaling the enumerated file in my `~/.zshrc` worked, and `mise doctor` now has no complaints. Haven't yet used it to install, say, Python versions, but I'm confident enough in this update for now.

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