Add haskell-language-server-bin to Arch Linux section (haskell#1642)

* Add haskell-language-server-bin to Arch Linux section

See haskell#1634

* fixup! Add haskell-language-server-bin to Arch Linux section

* fixup! fixup! Add haskell-language-server-bin to Arch Linux section

Co-authored-by: Potato Hatsue <[email protected]>

Author: marcin-rzeznicki

Diff for: README.md

@@ -140,7 +140,12 @@ To install, download the `haskell-language-server-wrapper` executable for your p
 
 ### Arch Linux
 
-If you are using Arch Linux with **dynamically linked** Haskell packages from `pacman`,
+The preferred method of installation for development purposes is to use the [haskell-language-server-bin](https://aur.archlinux.org/packages/haskell-language-server-bin) package from AUR.
+This package contains statically linked binaries for each supported GHC version and `haskell-language-server-wrapper` for automatic GHC version selection.
+It is updated regularly, requires no additional dependencies, and is independent of other haskell packages you may have on your system, including GHC.
+Its size is relatively large (approx. 900 MB), but if this is a problem for you, during installation you can disable the GHC versions you will not be using by editing the PKGBUILD file.
+
+Alternatively, if you want to use **dynamically linked** Haskell packages from `pacman`,
 you can install the latest pre-compiled version of `haskell-language-server` from [[community]](https://archlinux.org/packages/community/x86_64/haskell-language-server/):
 
 ```