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

Update Rust toolchain to 1.63.0
https://github.com/void-linux/void-packages/pull/38662

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

[ci skip]

`cargo-crev` requires 1.62 at least, so I thought I'd gave updating Rust a go, and it worked out just fine tbh. The new `cargo-crev` release compiled fine on this toolchain and works properly.

#### Local build testing
- I built this PR natively for
  - `x86_64`, `glibc` and `musl`
  - `i686`, `glibc`
- I crossbuilt this PR for
  - `aarch64`, `musl`
  - `ppc`, `glibc`
  - `ppc64`, `glibc`
  - `ppc64le`, `musl`