修正拼写错误：重命名 ZLMMediaServerStatusManger 为 ZLMMediaServerStatusManager，node_manger.md 为 node_manager.md

src/main/java/com/genersoft/iot/vmp/media/zlm/ZLMMediaServerStatusManager.java

@@ -32,7 +32,7 @@ import java.util.concurrent.ConcurrentHashMap;
  */
 @Slf4j
 @Component
-public class ZLMMediaServerStatusManger {
+public class ZLMMediaServerStatusManager {
 
     private final Map<Object, MediaServer> offlineZlmPrimaryMap = new ConcurrentHashMap<>();
     private final Map<Object, MediaServer> offlineZlmsecondaryMap = new ConcurrentHashMap<>();