docs(readme): Update Arch Linux notes since they default to LuaJIT now

README.md

@@ -65,9 +65,8 @@ Arch Linux has a prebuilt [SILE package][arch-sile] in the official package repo
 $ pacman -S sile
 ```
 
-The official package uses Lua 5.4.
-Alternatively, a package that uses LuaJIT may be built manually from the [Arch User Repository][aur] using [sile-luajit][aur-sile-luajit].
-A VCS package is also available as [sile-git][aur-sile-git] to build from the latest Git commit.
+The official package uses LuaJIT.
+If you install LuaRocks for use with SILE via `pacman`, use the `lua51-*` variants to match LuaJIT.
 
 #### Fedora
 
@@ -197,7 +196,7 @@ If you try to `brew link` and you get a series of messages including something l
       export PKG_CONFIG_PATH="/usr/local/opt/icu4c/lib/pkgconfig"
 
 Optionally you may install the Lua libraries listed in the [rockspec][] to your system (using either your system's package manager or [luarocks][] (`luarocks install --only-deps sile-dev-1.rockspec`).
-By default all the required Lua libraries will be downloaded and bundled alongside the SILE the instalation.
+By default all the required Lua libraries will be downloaded and bundled alongside the SILE the installation.
 If you downloaded a source tarball these dependencies are included, if you are using a git clone of the source repository the build system will require `luarocks` to fetch them during build.
 Note that OpenSSL development headers will be required for one of the Lua modules to compile¹.
 If your system has all the required packages already you may add `--with-system-luarocks` to the `./configure` command to avoid bundling them.
@@ -353,8 +352,6 @@ SILE is distributed under the [MIT licence][license].
   [libtexpdf]: https://github.com/sile-typesetter/libtexpdf
   [arch-sile]: https://archlinux.org/packages/community/x86_64/sile/
   [aur]: https://wiki.archlinux.org/index.php/Arch_User_Repository
-  [aur-sile-luajit]: https://aur.archlinux.org/packages/sile-luajit/
-  [aur-sile-git]: https://aur.archlinux.org/packages/sile-git/
   [typesetting]: https://en.wikipedia.org/wiki/Typesetting
   [tex]: https://en.wikipedia.org/wiki/TeX
   [indesign]: https://en.wikipedia.org/wiki/Adobe_InDesign