fix: auto replace version

docs/_coverpage.md

@@ -1,6 +1,6 @@
 ![logo](_media/icon.svg)
 
-# docsify <small>4.0</small>
+# docsify <small>4.1.7</small>
 
 > A magical documentation site generator.
 

docs/index.html

@@ -53,8 +53,8 @@
     plugins: [
       function(hook, vm) {
         hook.beforeEach(function (html) {
-          var url = 'https://github.com/QingWei-Li/docsify/blob/master/docs' + vm.router.getFile()
-          var editHtml = '[📝 EDIT DOCUMENT](' + url + ')\n'
+          var url = 'https://github.com/QingWei-Li/docsify/blob/master/docs' + vm.route.file
+          var editHtml = '[:memo: Edit Document](' + url + ')\n'
 
           return editHtml
             + html