net-mgmt/blackbox_exporter: Update to 0.23.0

• [SECURITY] Update Exporter Toolkit (CVE-2022-46146) #979

ChangeLog:
https://github.com/prometheus/blackbox_exporter/releases/tag/v0.23.0

MFH: 2022Q4
Security: CVE-2022-46146
(cherry picked from commit 94de9f12687a526bbab16cfd905b485503cc40cf)