fix: tcp_json_srv 引用 SocketId_TCP 缺少 extern 声明

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/include/tcp_json_srv.h

@@ -47,6 +47,8 @@ typedef enum {
 /*===========================================================================
  * Externs
  *===========================================================================*/
+extern uint8_t SocketId_TCP;
+extern uint8_t SocketId_UDP;
 extern uint8_t  g_json_socket_listen;    // listen socket ID
 extern uint8_t  g_json_socket_client;    // accepted client socket ID (0xFF = none)
 extern TcpJsonAuthState g_json_auth_state;