security/py-nethsm: Update 2.1.2 => 3.0.0
While here, remove extra space before backslash in RUN_DEPENDS field.
Changelog:
- Breaking change: Return FullClusterJoinData instead of ClusterJoinData from add_cluster_member (requires NetHSM v5)
https://github.com/Nitrokey/nethsm-sdk-py/releases/tag/v3.0.0
PR: 298489
Approved by: osa, vvd (Mentors, implicit)