message: docs: add voidlinux install instructions to README
diff: - [Gentoo](#gentoo)
  - [Nix](#nix)
  - [Solus](#solus)
  + - [Void](#void)
  - [Homebrew](#homebrew)
  - [MacPorts](#macports)
  - [Scoop](#scoop)
  @@ -208,6 +209,11 @@ nix-env -i bottom
  sudo eopkg it bottom
  ```
  +### Void
  +```bash
  +sudo xbps-install bottom
  +```
  +
  ### Homebrew
  ```bash
  