security/py-netbox-secrets: Update to 2.2.1
- Switch to the PEP517 build framework while I'm here.
Changelog:
https://github.com/Onemind-Services-LLC/netbox-secrets/releases/tag/v2.2.1
MFH: 2025Q2
(cherry picked from commit 41f692c74a757a993f8e2932784b6bf2ea7b8762)