Log Message:
prometheus: updated to 2.18.1

2.18.1:
[BUGFIX] TSDB: Fixed snapshot API.

2.18.0:
[CHANGE] Federation: Only use local TSDB for federation (ignore remote read).
[CHANGE] Rules: rule_evaluations_total and rule_evaluation_failures_total have a \ 
rule_group label now.
[FEATURE] Tracing: Added experimental Jaeger support
[ENHANCEMENT] TSDB: Significantly reduce WAL size kept around after a block cut.
[ENHANCEMENT] Discovery: Add architecture meta label for EC2.
[BUGFIX] UI: Fixed wrong MinTime reported by /status.
[BUGFIX] React UI: Fixed multiselect legend on OSX.
[BUGFIX] Remote Write: Fixed blocked resharding edge case.
[BUGFIX] Remote Write: Fixed remote write not updating on relabel configs change.