Adding an anchor on each helper

doc/helper_doc_template.md

@@ -10,11 +10,10 @@ routes:
 Doc auto-generated by [this script](https://github.com/YunoHost/yunohost/blob/{{ current_commit }}/doc/generate_helper_doc.py) on {{data.date}} (YunoHost version {{data.version}})
 
 {% for category, helpers in data.helpers %}
-### {{ category.upper() }}
+## {{ category.upper() }}
 {% for h in helpers %}
-**{{ h.name }}**<br/>
+#### {{ h.name }}
 [details summary="<i>{{ h.brief }}</i>" class="helper-card-subtitle text-muted"]
-<p></p>
 
 **Usage**: `{{ h.usage }}`
 {%- if h.args %}