Update Your <h1> Tag Overrides to <h3> for Topic Detail and Search Results Article Titles
To improve accessibility to our communities, we updated the <h1>
tags for article titles in Topic Detail and Search Results components. If you’ve overridden
the <h1> tags, make sure that you update them to <h3> so that they continue working.
Where: This change applies to Lightning communities accessed through Lightning Experience and Salesforce Classic. Communities are available in Enterprise, Performance, Unlimited, and Developer editions.