package/python-pytest: bump to version 7.1.2

There is just a starting year in licence file now (see [1]), but
licence itself did not change.

Also fixup the spacing in the hash file to match the "new" coding
style.

[1] https://github.com/pytest-dev/pytest/commit/ed24f29e6017183ea22f3136aa180a8e3280cf8a



Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>