Update blackbox exporter

[pschiffe]

Request

There's a lot of new, useful features in the last couple of releases.

Use case

For example fail_if_body_json_not_matches_cel
prometheus/blackbox_exporter#1255

[github-actions]

This issue has not had any activity in the past 90 days, so the needs-attention label has been added to it.
If the opened issue is a bug, check to see if a newer release fixed your issue. If it is no longer relevant, please feel free to close this issue.
The needs-attention label signals to maintainers that something has fallen through the cracks. No action is needed by you; your issue will be kept open and you do not have to respond to this comment. The label will be removed the next time this job runs if there is new activity.
Thank you for your contributions!

[ForgottenBeast]

I'm interested!

[dehaansa]

Apologies that this never got triaged - we would welcome the update if anyone has capacity to take it on. We can add it to our internal backlog, but I can't offer any timeline on prioritization. I'll tag it with help-wanted, or @ForgottenBeast if you were looking to pick this up we can assign it to you!