add mcsr launcher to allowed launcher list (#189)

Author: tildejustin

rules.typ

@@ -132,6 +132,7 @@ A.1.1) An allowed launcher must be used.
 - A.1.1.d) #formatLink("https://modrinth.com/app")[Modrinth App]
 - A.1.1.e) #formatLink("https://atlauncher.com")[ATLauncher]
 - A.1.1.f) Guidance: If you want another launcher to be considered for legalization, please open a thread. Launchers are only allowed if they do not significantly modify the game.
+- A.1.1.g) #formatLink("https://github.com/MCSRLauncher/Launcher")[MCSR Launcher]
 A.1.2) Runs must be performed on Minecraft 1.0 or later using an official release.
 - The versions this excludes are:
 - A.1.2.a) Beta releases