Check potential md to adoc conversion issue with html anchor

[bonitasoft]

Check potential md to adoc conversion issue with html anchor

[alachambre]

More details:

The following markdown

<a id="user-task"/>
### User task list re-design

Is converted to

+++<a id="user-task">++++++</a>+++
=== User task list re-design

Which gives the following HTML:

<div class="sect2">
	...
	<div class="paragraph">
		<p><a id="user-task"></a></p>
	</div>
</div>
<div class="sect2">
	<h3 id="_user_task_list_re_design">
		<a class="anchor" href="#_user_task_list_re_design"></a>
		User task list re-design
	</h3>
	<div class="paragraph">
	...
</div>

-> A native anchor is generated by Antora for Asciidoctor titles.
-> Any links in the Bonita documentation that refers to the old anchor must be updated to the new one
⚠️ It seems to mostly impact the highlight cards in the index.html which refer a lot to anchors in the release note!
❓ A search and replace (manual ?) on the old anchor could be enough ?

-> The empty links generated from the old anchors should be removed, but the impact seems to be small.

[benjaminParisel]

I think we could replace +++<a id="user-task">++++++</a>+++ by [#user-task] to keep this anchor. I already do it for release note in branch 7.6 and 7.10 and it's work fine.

Automatically script cool be nice to be written and add in migration procedure

[tbouffard]

closed by #90