Build System: Update Doxygen to >=1.10.0 to fix URLs in Headlines

[crasbe]

Description

While updating the LOSTANDFOUND.md file, I noticed that the headlines are not correctly formatted. After some (a lot) of searching I found out that this is a Doxygen bug ( doxygen/doxygen#10466 ) which has been fixed in version >=1.10.0 ( doxygen/doxygen#10466 (comment) ).

I'm not sure if that was a regression introduced to Doxygen at some point or if it never looked right (which I doubt).
Perhaps something in the RIOT documentation will break when updating Doxygen. For testing, I installed the lastest 1.12.0 and it complained about some configuration options being deprecrated. However my Doxygen knowledge is quite limited, so this might have some side effects or additional effort attached to it.

Current Behavior

This is a screenshot taken from https://doc.riot-os.org/md_LOSTANDFOUND.html

Expected Behaviour

This was rendered on my machine with Doxygen 1.12.0: