refactor: update default executable name for Rising World server

The default executable name for the Rising World server has been updated from "server.jar" to "RisingWorldServer.x64". This change ensures that the correct executable is used when launching the game server.

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

@@ -159,8 +159,7 @@ glibc="null"
 ## Game Server Directories
 systemdir="${serverfiles}"
 executabledir="${serverfiles}"
-preexecutable="java -Xmx${javaram}M -jar"
-executable="./server.jar"
+executable="./RisingWorldServer.x64"
 servercfgdir="${systemdir}"
 servercfg="server.properties"
 servercfgdefault="server.properties"