UI: Add viewport meta tag to embedded topics layout

UI: Add viewport meta tag to embedded topics layout

diff --git a/app/views/layouts/embed.html.erb b/app/views/layouts/embed.html.erb
index b7b714f..42b70d0 100644
--- a/app/views/layouts/embed.html.erb
+++ b/app/views/layouts/embed.html.erb
@@ -2,7 +2,7 @@
 <html<%= raw @embeddable_css_class -%>>
   <head>
     <meta charset="utf-8">
-
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, user-scalable=yes, viewport-fit=cover">
     <%= discourse_stylesheet_link_tag 'embed', theme_ids: nil %>
     <%- unless customization_disabled? %>
       <%= discourse_stylesheet_link_tag  :embedded_theme %>

GitHub sha: 8f601d50