fix homepage btn classes

docs/index.html

@@ -28,7 +28,7 @@ title: Bootstrap · The world's most popular mobile-first and responsive f
         <h4>Managed dependencies</h4>
         <p>Include Bootstrap's source Sass and JavaScript files via Bower, Composer, Meteor, or npm. Package managed installs don't include documentation, but do include our Gruntfile and readme.</p>
         <p>
-          <a class="btn btn-primary" href="">View install methods</a>
+          <a class="btn btn-bs btn-outline" href="">View install methods</a>
         </p>
       </div>
       <!-- <div class="col-sm-4">
@@ -51,7 +51,7 @@ title: Bootstrap &middot; The world's most popular mobile-first and responsive f
     <hr class="half-rule">
 
     <p class="lead">More customized builds of Bootstrap's CSS and JS are also available.</p>
-    <a href="{{ site.baseurl }}/getting-started/download" class="btn btn-outline btn-lg">More download options</a>
+    <a href="{{ site.baseurl }}/getting-started/download" class="btn btn-bs btn-outline btn-lg">More download options</a>
   </div>
 </div>
 
@@ -83,7 +83,7 @@ title: Bootstrap &middot; The world's most popular mobile-first and responsive f
     <hr class="half-rule">
 
     <p class="lead">Bootstrap is open source. It's hosted, developed, and maintained on GitHub.</p>
-    <a href="{{ site.repo }}" class="btn btn-outline btn-lg">View the GitHub project</a>
+    <a href="{{ site.repo }}" class="btn btn-bs btn-outline btn-lg">View the GitHub project</a>
   </div>
 </div>
 
@@ -107,6 +107,6 @@ title: Bootstrap &middot; The world's most popular mobile-first and responsive f
     <hr class="half-rule">
 
     <p class="lead">We showcase dozens of inspiring projects built with Bootstrap on the Bootstrap Expo.</p>
-    <a href="{{ site.expo }}" class="btn btn-outline btn-lg">Explore the Expo</a>
+    <a href="{{ site.expo }}" class="btn btn-bs btn-outline btn-lg">Explore the Expo</a>
   </div>
 </div>