fix extra margin on the admin bar sub title (#3385)

Regression bug:

hypha/core/templates/components/admin_bar.html

@@ -4,7 +4,7 @@
     <div class="admin-bar__inner items-center md:flex md:justify-between">
         <div>
             <h1 class="text-2xl mb-0 font-bold md:text-3xl md:m-0">{% render_slot slots.header %}</h1>
-            {% if slots.sub_heading %}<p class="text-sm hidden md:block">{% render_slot slots.sub_heading %}</p>{% endif %}
+            {% if slots.sub_heading %}<p class="text-sm hidden md:block m-0">{% render_slot slots.sub_heading %}</p>{% endif %}
         </div>
 
         {% render_slot slots.inner_block %}