Use `banner` landmark or `<header>` element for the admin header area

[Thibaud Colas]

The Django admin uses a <div id="header"></div> for its header area. Switching this to a <header> tag or adding a role="banner" attribute to the div would help screen reader users navigate the interface – they would have an easier time bypassing the whole area when going through the page sequentially, and would also be able to jump straight to the header from any point on the page.

Usage of the correct HTML header tag is ideal, but might prove problematic if CSS was written with overly specific HTML elements. We can get the same benefits for screen reader users with role="banner".