layout.erb in sidekiq-5.2.0

- old
+ new

@@ -1,9 +1,9 @@
 <!doctype html>
 <html dir="<%= text_direction %>">
   <head>
     <title><%= environment_title_prefix %><%= Sidekiq::NAME %></title>
-    <meta charset="utf8" />
+    <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width,initial-scale=1.0" />
 
     <link href="<%= root_path %>stylesheets/bootstrap.css" media="screen" rel="stylesheet" type="text/css" />
     <% if rtl? %>
     <link href="<%= root_path %>stylesheets/bootstrap-rtl.min.css" media="screen" rel="stylesheet" type="text/css"/>