fix(rustserver): corrected stop mode for Rust (#2588)

lgsm/config-default/config-lgsm/rustserver/_default.cfg

@@ -144,7 +144,7 @@ steammaster="false"
 # 8: 7 Days to Die
 # 9: Gold Source
 # 10: Teamspeak 3
-stopmode="3"
+stopmode="2"
 
 ## Game Server Details
 # Do not edit