update document

xxl-job-admin/src/main/resources/application.properties

 management.health.mail.enabled=false
 
 ### resources
-spring.mvc.static-path-pattern=/static/**
 spring.mvc.servlet.load-on-startup=0
+spring.mvc.static-path-pattern=/static/**
 spring.resources.static-locations=classpath:/static/
 
 ### freemarker