修改头部名称

components/header.vue

@@ -61,12 +61,12 @@
             keyPath: '/',
           },
           {
-            content:  '考试平台',
+            content:  '考试系统',
             keyPath:  '/examsystem',
             children: [],
           },
           {
-            content:  '培训平台',
+            content:  '培训系统',
             keyPath:  '/trainsystem',
             children: [],
           },