修改tomcat配置写法

src/main/resources/application.yml

@@ -2,10 +2,11 @@
 server:
   tomcat:
     uri-encoding: UTF-8
-    max-threads: 1000
-    min-spare-threads: 30
+    threads:
+      max: 1000
+      min-spare: 30
+    connection-timeout: 5000ms
   port: 8080
-  connection-timeout: 5000ms
   servlet:
     context-path: /renren-fast