The current documentation build dependencies are not compatible with
Python 3.9. Update to Python 3.12.
Use the current Ubuntu LTS release, i.e. 24.04 Noble Numbat.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
readthedocs.org allows to automatically generate and publish the HTML
documentation for the U-Boot project.
Add a file controlling building https://u-boot.readthedocs.io/.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
