gobrake v5.6.1 flagged out of date on airbrake.io?

[vendion]

When I open up one of my projects on airbrake.io I get the following warning banner:

Your project is using an outdated notifier library. Please update to the current version to get new features like Performance Monitoring

But checking my go.mod the project depends on v5.6.1

github.com/airbrake/gobrake/v5 v5.6.1

and from unrelated error output from gobrake I can confirm this:

Apr 04 13:42:31 borg2-clone JuiceAPI[27197]: gobrake: 2023/04/04 13:42:31 remote_config.go:71: fetchConfig failed for https://notifier-configs.airbrake.io/2020-06-18/config/361510/config.json. Reason: Get "https://notifier-configs.airbrake.io/2020-06-18/config/361510/config.json?language=go1.20.2&notifier_name=gobrake&notifier_version=5.6.1&os=linux": context deadline exceeded (Client.Timeout exceeded while awaiting headers)