[WebAIM] Fix Redundant link

Author: oleksis

_includes/header.html

@@ -1,5 +1,5 @@
 <header class="site-header" role="banner">
-  <h1 class="site-title"><a class="logo-text" href="/">BPDev</a></h1>
+  <h1 class="site-title"><a class="logo-text" href="/index.html">BPDev</a></h1>
   <nav class="site-navigation">
     <div class="site-navigation-wrap">
       <ul class="menu" role="menu">