New comment by cinerea0 on void-packages repository

https://github.com/void-linux/void-packages/pull/32555#issuecomment-955948558

Comment:
Versions of Rust up to and including 1.56.0 have apparently been affected by [a CVE dealing with "bidirectional override" unicode codepoints](https://blog.rust-lang.org/2021/11/01/cve-2021-42574.html). As such, this PR should target version 1.56.1, which includes compiler warnings to stop people from triggering the vulnerability.