We are currently having some problems with the RPM-based distributions (e.g. RedHat, Fedora, CentOS, SUSE, etc.)
If you try to update Grafana to a newer version, you may get the message e.g.
Package grafana-10.1.0-1.x86_64.rpm is not signed
And then the update fails .
Luckily, this is a known issue as already reported here:
The Packaging team is already working on the Fix and will provide an update ASAP
Thank you for your patience