One solution could be to add a small section on the series page that lists the publish date and version of the framework used in the series. This could be placed near the title or at the top of the page so that it is easily visible to users. Additionally, if a series is outdated, it could be marked as such or moved to an archive section. Follow-up videos or updated versions of the series could also be created to address changes in the framework.
Here's an example of how the publish date and version information could be displayed on the series page:
<h1>Series Title</h1>
<p>Publish Date: January 1, 2021</p>
<p>Framework Version: Laravel 8.0</p>
<!-- rest of the series content -->