[prometheus-blackbox-exporter] add action=replace to metricsRelabelings

This (default) parameter is automatically added by k8s, causing the in-cluster
object to differ from the manifest created by this chart. This discrepancy
causes GitOps tooling to consider the resource out of date, as described in
prometheus-community#3626

Signed-off-by: Alex Miller <alex@thinkmassive.org>

charts/prometheus-blackbox-exporter/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 description: Prometheus Blackbox Exporter
 name: prometheus-blackbox-exporter
-version: 8.4.0
+version: 8.4.1
 appVersion: v0.24.0
 home: https://github.com/prometheus/blackbox_exporter
 sources:

charts/prometheus-blackbox-exporter/templates/servicemonitor.yaml

@@ -37,12 +37,15 @@ spec:
       - sourceLabels: [instance]
         targetLabel: instance
         replacement: {{ .url }}
+        action: replace
       - sourceLabels: [target]
         targetLabel: target
         replacement: {{ .name }}
+        action: replace
         {{- range $targetLabel, $replacement := .additionalMetricsRelabels | default $.Values.serviceMonitor.defaults.additionalMetricsRelabels }}
       - targetLabel: {{ $targetLabel | quote }}
         replacement: {{ $replacement | quote }}
+        action: replace
         {{- end }}
 {{- if concat (.additionalRelabeling | default list) $.Values.serviceMonitor.defaults.additionalRelabeling }}
     relabelings: