Fix bottom position of scroll buttons in build log page

app/assets/stylesheets/pages/builds.scss

@@ -21,7 +21,7 @@
 
   .autoscroll-container {
     position: fixed;
-    bottom: 10px;
+    bottom: 20px;
     right: 20px;
     z-index: 100;
   }
@@ -34,7 +34,7 @@
 
     a {
       display: block;
-      margin-bottom: 5px;
+      margin-bottom: 10px;
     }
   }