python3-docutils: upgrade to 0.22

python3-docutils: upgrade to 0.22

License-Update: the code that was ZPL-licensed has been removed[1].

Explicitly set a non-GPLv3 LICENSE on the output package as we don't
actually ship the GPLv3 file.

This fixes the incorrect hashbangs, so we can remove the manual seds.

Signed-off-by: Ross Burton <ross.burton@arm.com>
[1] https://sourceforge.net/p/docutils/code/9977/

Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>