textproc/py-gi-docgen: update to 2022.1
Bump gi-docgen; the patch to docgen is entirely from Olivier,
the dependent ports that get a bump and a plist-fix is from me.
Consumers have PORTREVISION bumped to reflect changes in plist:
- pygment.css is no longer installed
- more fonts .woff files are installed
Obtained from: Olivier Duchateau
PR: 263199