Prometheus release candidate 2.28.0-rc.0 is available

[Julius Volz]

[apologies for the incorrectly versioned last email]

Hello everyone,

The first release candidate of Prometheus 2.28 has been released.

Some key features are a new generic HTTP-based service discovery mechanism, service discovery support for Linode, as well as support for displaying trace exemplars in the graphing interface. The new experimental PromQL editor is now enabled by default.

- See the full changelog & grab the binaries:
  https://github.com/prometheus/prometheus/releases/tag/v2.28.0-rc.0
- See https://quay.io/repository/prometheus/prometheus?tab=tags and
  https://hub.docker.com/r/prom/prometheus/tags for container images.

Please help us test this release candidate and provide us with feedback!

Regards,
Julius