packaging: link to Arch Linux package

Arch Linux now ships knot-resolver in their repositories, delete
reference to AUR.

Thanks to daurnimator who adopted the package!

README.md

@@ -30,7 +30,7 @@ Knot Resolver is also available from the following distributions' repositories.
   [Debian testing](https://packages.debian.org/testing/knot-resolver),
   [Debian unstable](https://packages.debian.org/sid/knot-resolver)
 * [Ubuntu](https://packages.ubuntu.com/bionic/knot-resolver)
-* [Arch Linux (AUR)](https://aur.archlinux.org/packages/knot-resolver)
+* [Arch Linux](https://archlinux.org/packages/community/x86_64/knot-resolver/)
 
 ### Building from sources
 

doc/quickstart-install.rst

@@ -65,12 +65,10 @@ distribution.
 
 **Arch Linux**
 
-Use
-`knot-resolver <https://aur.archlinux.org/packages/knot-resolver/>`_
-package from AUR_.
+.. code-block:: bash
+
+   $ sudo pacman -S knot-resolver
 
 
 **openSUSE Leap / Tumbleweed**
 Add the `OBS <https://en.opensuse.org/Portal:Build_Service>`_ package repository `home:CZ-NIC:knot-resolver-latest <https://software.opensuse.org/download.html?project=home%3ACZ-NIC%3Aknot-resolver-latest&package=knot-resolver>`_ to your system.
-
-.. _AUR: https://wiki.archlinux.org/index.php/Arch_User_Repository