Update message_en.properties

maxkey-web-maxkey/src/main/resources/messages/message_en.properties

@@ -1,4 +1,4 @@
-global.application=MaxKey Secure Sign-on System
+global.application=MaxKey Sign-on System
 global.change.language=Language
 global.change.language.en=English
 global.change.language.zh=\u4E2D\u6587