Normalize quotes, remove useless attributes (#2528)

Author: Vadim Makeev

themes/vue/layout/layout.ejs

@@ -54,10 +54,10 @@
     <link href="https://fonts.gstatic.com" rel="preconnect" crossorigin>
     <link href="https://maxcdn.bootstrapcdn.com" rel="preconnect" crossorigin>
 
-    <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600|Roboto Mono&display=swap' rel='stylesheet' type='text/css'>
-    <link href='https://fonts.googleapis.com/css?family=Dosis:500&text=Vue.js&display=swap' rel='stylesheet' type='text/css'>
+    <link href="https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600|Roboto Mono&display=swap" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css?family=Dosis:500&text=Vue.js&display=swap" rel="stylesheet">
 
-    <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" type="text/css">
+    <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
 
     <!-- main page styles -->
     <%- css(isIndex ? 'css/index' : 'css/page') %>