howto.html in appscms-tools-theme-3.9.0

- old
+ new

@@ -1,7 +1,5 @@
-<div
-  class="container mx-auto appscms-how-to-section col-md-9 p-3 pb-3 mt-5 col-12"
->
+<div class="container appscms-how-to-section p-3 pb-3 mt-5">
   <div class="row align-items-center py-3">
     {%- if site.monumetricId and page.url != '/' and page.lang == 'en' -%}
     <div class="col-md-9 mx-auto">
       <div class="row">
         {%- endif -%}