fix(squad): fix to use the proper default config (#3954)

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

@@ -163,7 +163,7 @@ systemdir="${serverfiles}/SquadGame"
 executabledir="${serverfiles}"
 executable="./SquadGameServer.sh"
 servercfgdir="${systemdir}/ServerConfig"
-servercfg="${selfname}.cfg"
+servercfg="Server.cfg"
 servercfgdefault="Server.cfg"
 servercfgfullpath="${servercfgdir}/${servercfg}"