Fix Skript MinecraftServer.isRunning reflection on 1.20(.1) (SkriptLa…

…ng#6352)

src/main/java/ch/njol/skript/Skript.java

@@ -1157,7 +1157,15 @@ public void onPluginDisable(PluginDisableEvent event) {
 			try {
 				// Spigot removed the mapping for this method in 1.18, so its back to obfuscated method
 				// 1.19 mapping is u and 1.18 is v
-				String isRunningMethod = Skript.isRunningMinecraft(1, 19) ? "u" : Skript.isRunningMinecraft(1, 18) ? "v" :"isRunning";
+				String isRunningMethod = "isRunning";
+
+				if (Skript.isRunningMinecraft(1, 20)) {
+					isRunningMethod = "v";
+				} else if (Skript.isRunningMinecraft(1, 19)) {
+					isRunningMethod = "u";
+				} else if (Skript.isRunningMinecraft(1, 18)) {
+					isRunningMethod = "v";
+				}
 				IS_RUNNING = MC_SERVER.getClass().getMethod(isRunningMethod);
 			} catch (NoSuchMethodException e) {
 				throw new RuntimeException(e);