package/pocketpy: bump to version 2.1.1

The LICENSE sha256 changed because of a date update (2023 -> 2024),
not due to any substantive license modification.

Release notes:
https://github.com/pocketpy/pocketpy/releases/tag/v2.1.1



Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>