Update SatNOGS repositories PGP key
Old key: home:librespace OBS Project / 8DB3D79 2019-01-15 [expired: 2023-05-22] New key: home:librespace OBS Project / 8DB3D79 2019-01-15 [expires: 2025-07-31]
Source: http://download.opensuse.org/repositories/home:/librespace:/satnogs/Raspbian_11/Release.key
Fixes #26 (closed).