Update Arch Linux Build Steps...

[rahulc07]

The arch linux build steps are a bit out of date. And also the jar doesn't run out of the box, you have to compile it

1:Install Java 11 by doing 'sudo pacman -S jdk11-openjdk'
2:Switch your java version by doing 'sudo archlinux-java set java-11-openjdk'
3:Clone the git repo and navigate to it(self explanatory)
4.Use the gradlew script built into the repo to build(its an older version): './gradlew -q buildAll'
5:Set java version back to java 8 or 16 by doing: sudo archlinux-java set java-11-openjdk OR sudo archlinux-java set java-8-openjdk/jre

the final WORKING jar file is here https://www.mediafire.com/file/k0k2p21gxe7azxp/sassa-v0.6.3.jar/file