readme: add void linux

Author: fanyx

docs/changelog.rst

@@ -117,6 +117,7 @@ Other changes:
 - Refactored library.py file by splitting it into multiple modules within the
   beets/library directory.
 - Added a test to check that all plugins can be imported without errors.
+- :doc:`/guides/main`: Add instructions to install beets on Void Linux.
 
 2.3.1 (May 14, 2025)
 --------------------

docs/guides/main.rst

@@ -26,6 +26,8 @@ You will need Python. Beets works on Python 3.8 or later.
   which will probably set your computer on fire.)
 - On **Alpine Linux**, `beets is in the community repository <alpine package_>`_
   and can be installed with ``apk add beets``.
+- On **Void Linux**, `beets is in the official repository <void package_>`_
+  and can be installed with ``xbps-install -S beets``.
 - For **Gentoo Linux**, beets is in Portage as ``media-sound/beets``. Just run
   ``emerge beets`` to install. There are several USE flags available for
   optional plugin dependencies.
@@ -53,6 +55,8 @@ You will need Python. Beets works on Python 3.8 or later.
 
 .. _macports: https://www.macports.org
 
+.. _void package: https://github.com/void-linux/void-packages/tree/master/srcpkgs/beets
+
 .. _nixos: https://github.com/NixOS/nixpkgs/tree/master/pkgs/tools/audio/beets
 
 .. _openbsd: http://openports.se/audio/beets