Update install_dependencies_linux.sh

Installation instructions referred to the VulkanSDK Linux tarball as a tar.gz, but on the lunarg website it is provided as a tar.xz.
Changed the command to reflect that.

Author: ricardosetton

scripts/install_dependencies_linux.sh

@@ -121,7 +121,7 @@ echo "Now you need to install the Vulkan SDK:"
 echo "1. Download the tarball from https://vulkan.lunarg.com/"
 echo "2. Extract it to a convenient location, for example:"
 echo "   mkdir -p ~/vulkansdk"
-echo "   tar -xzf vulkansdk-linux-x86_64-<version>.tar.gz -C ~/vulkansdk"
+echo "   tar -xf vulkansdk-linux-x86_64-<version>.tar.xz -C ~/vulkansdk"
 echo "   cd ~/vulkansdk"
 echo "   ln -s <version> default"
 echo ""