update silence link (again)

helm/observability-operator/files/alertmanager/notification-template.tmpl

@@ -35,7 +35,7 @@
 📈 Dashboard: ⚠️ There is no **dashboard** for this alert, time to sketch.
 {{ end -}}
 👀 Explore: {{ template "__queryurl" . }}
-🔔 Silence: https://github.com/giantswarm/silences#silences
+🔔 Silence: {{ template "__alert_silence_link" . }}
 
 ---
 
@@ -45,17 +45,9 @@
 🔥 {{ if .Labels.instance }}{{ .Labels.instance }}: {{ end }}{{ .Annotations.description }}{{ end }}
 {{- end }}
 
-# This builds the silence URL.  We exclude the alertname in the range
-# to avoid the issue of having trailing comma separator (%2C) at the end
-# of the generated URL
+# Link to the silence repository where silences should be created
 {{ define "__alert_silence_link" -}}
-    {{ .ExternalURL }}/#/silences/new?filter=%7B
-    {{- range .CommonLabels.SortedPairs -}}
-        {{- if ne .Name "alertname" -}}
-            {{- .Name }}%3D"{{- .Value -}}"%2C%20
-        {{- end -}}
-    {{- end -}}
-    alertname%3D"{{ .CommonLabels.alertname }}"%7D
+https://github.com/giantswarm/silences#silences
 {{- end }}
 
 # Link to related PMs