Add "expires after" to CertificateRenewal alert description

deploy/charts/x509-certificate-exporter/templates/prometheusrule.yaml

@@ -61,7 +61,7 @@ spec:
         {{- end }}
       annotations:
         summary: Certificate should be renewed
-        description: Certificate for "{{ "{{" }} $labels.subject_CN {{ "}}" }}" should be renewed {{ "{{if" }} $labels.secret_name {{ "}}" }}in Kubernetes secret "{{ "{{" }} $labels.secret_namespace {{ "}}" }}/{{ "{{" }} $labels.secret_name {{ "}}" }}"{{ "{{else}}" }}at location "{{ "{{" }} $labels.filepath {{ "}}" }}"{{ "{{end}}" }}
+        description: Certificate for "{{ "{{" }} $labels.subject_CN {{ "}}" }}" should be renewed as it expires after {{`{{`}} humanizeDuration $value {{`}}`}} {{ "{{if" }} $labels.secret_name {{ "}}" }}in Kubernetes secret "{{ "{{" }} $labels.secret_namespace {{ "}}" }}/{{ "{{" }} $labels.secret_name {{ "}}" }}"{{ "{{else}}" }}at location "{{ "{{" }} $labels.filepath {{ "}}" }}"{{ "{{end}}" }}
         {{- if .Values.prometheusRules.alertExtraAnnotations }}
         {{- toYaml .Values.prometheusRules.alertExtraAnnotations | nindent 8 }}
         {{- end }}