Fix Arch documentation

pacman -Sy is a bad command and should never be ran as it syncs the repositories but doesn't actually  upgrade the software on the system which could royally screw up an unknowing Arch noob's system.

docs/INSTALL.md

@@ -7,15 +7,15 @@ Download packages [here](https://jenkins.thebrokenrail.com/job/minecraft-pi-rebo
 * Debian Buster/Ubuntu 18.04 Or Higher
 * QEMU User-Mode
   * Debian/Ubuntu: ``sudo apt install qemu-user``
-  * Arch: ``sudo pacman -Sy qemu-user``
+  * Arch: ``sudo pacman -S qemu-user``
 * Client-Only Dependencies
   * Graphics Drivers
   * GTK+ 3
     * Debian/Ubuntu: ``sudo apt install libgtk-3-0``
-    * Arch: ``sudo pacman -Sy gtk3``
+    * Arch: ``sudo pacman -S gtk3``
   * OpenAL
     * Debian/Ubuntu: ``sudo apt install libopenal1``
-    * Arch: ``sudo pacman -Sy openal``
+    * Arch: ``sudo pacman -S openal``
 
 ### Running
 Follow [these](https://docs.appimage.org/introduction/quickstart.html#how-to-run-an-appimage) instructions.