Update CORE_LEG_STABLE to 7.99
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3408757. -->
Reported by: [poker10](https://www.drupal.org/user/272316)
Related to !97 !95
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Drupal 7.99 was released on 6.12.2023. We should update the <code>CORE_LEG_STABLE</code> variable. </p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<h3 id="summary-ui-changes">User interface changes</h3>
<h3 id="summary-api-changes">API changes</h3>
<h3 id="summary-data-model-changes">Data model changes</h3>
issue