Update zfs-linux to 2.0.3

[Martin Matuška]

Dear Ubuntu package maintainers,

it would be great if you could update the latest zfs-linux to Debian 
version 2.0.3-1 before releasing hirsute or at least provide a 
backported fix for the bug described below.

A serious bug has been fixed in version 2.0.3 that prevents the 
possibility of writing corrupted file modes to disk.

References:
https://github.com/openzfs/zfs/issues/11474
https://github.com/openzfs/zfs/pull/11576
https://github.com/openzfs/zfs/commit/8829ba19b7fb47bef6affac8d82ed6d56dbf6d38 


Best regards,
mm