Wrong anchor for functions called "header"

If a function is called "header", the doc generates an anchor called "header", which however links to another element of the page.

For instance, try clicking on the link for the header() method in this doc page:

https://doc-snapshots.qt.io/qt6-dev/qnetworkrequest.html#header

You'll be moved to the top of the page instead of jumping to the method in question.