[stable/prometheus] upgrade alertmanager (#7193)

* upgrade alertmanager

* bump version

stable/prometheus/Chart.yaml

@@ -1,5 +1,5 @@
 name: prometheus
-version: 7.0.1
+version: 7.0.2
 appVersion: 2.3.2
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/

stable/prometheus/README.md

@@ -95,7 +95,7 @@ Parameter | Description | Default
 `alertmanager.enabled` | If true, create alertmanager | `true`
 `alertmanager.name` | alertmanager container name | `alertmanager`
 `alertmanager.image.repository` | alertmanager container image repository | `prom/alertmanager`
-`alertmanager.image.tag` | alertmanager container image tag | `v0.15.1`
+`alertmanager.image.tag` | alertmanager container image tag | `v0.15.2`
 `alertmanager.image.pullPolicy` | alertmanager container image pull policy | `IfNotPresent`
 `alertmanager.prefixURL` | The prefix slug at which the server can be accessed | ``
 `alertmanager.baseURL` | The external url at which the server can be accessed | `/`

stable/prometheus/values.yaml

@@ -33,7 +33,7 @@ alertmanager:
   ##
   image:
     repository: prom/alertmanager
-    tag: v0.15.1
+    tag: v0.15.2
     pullPolicy: IfNotPresent
 
   ## alertmanager priorityClassName