Adjust alt text and navbar brand link to reflect new logo

Author: metageeky

_includes/nav.html

@@ -3,7 +3,10 @@ <h2 class="sr-only" id="mainnav-heading">Site</h2>
   <!-- <div class="container-fluid"> -->
     <!-- Brand and toggle get grouped for better mobile display -->
     <!-- <div class="navbar-header"> -->
-      <a class="navbar-brand" aria-label="Code4Lib {{ site.data.conf.year }}" href="{{ site.baseurl }}/"><img src="{{ "/assets/img/theme-images/c4l-logo.svg" | relative_url }}" alt="Code4Lib"></a>
+      <a class="navbar-brand" href="{{ site.baseurl }}/">
+			  <img src="{{ "/assets/img/theme-images/c4l-logo.svg" | relative_url }}" alt="">
+			  <span class="sr-only">Code4Lib {{ site.data.conf.year }}"</a>
+			</a>
       <!-- <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-controls="mainNavBar" aria-expanded="false" aria-label="Toggle navigation"> -->
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#mainNavBar" aria-controls="mainNavBar" aria-expanded="false" aria-label="Toggle navigation">
         <span class="sr-only">Toggle navigation</span>