[Photon] Closing the Photon mailinglist

[Sarah Hoffmann]

Hi all,

this mailinglist (photon at openstreetmap.org) hasn't see much traffic
in recent years. People have moved on to different modes of
communication, so it is time to close it down.

To follow news around Photon, subscribe to the Github repository.
This is also the right place for reporting issues with the software.

For questions and discussions use the Github discussion forum at
https://github.com/komoot/photon/discussions or use the OpenStreetMap
community forum at https://community.openstreetmap.org/

Thanks

Sarah