MFH: r555759

net-mgmt/prometheus2: Update to 2.22.1

Changes: https://github.com/prometheus/prometheus/releases/tag/v2.22.1
PR: 251087
Submitted by: David O'Rourke <dor.bsd@xm0.uk> (maintainer)

Approved by: ports-secteam (bugfix release blanket)