bump alertmanager to 0.28.0 (#5189)

Signed-off-by: drfaust92 <ilia.lazebnik@gmail.com>

Author: DrFaust92

charts/kube-prometheus-stack/Chart.yaml

@@ -23,7 +23,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 68.1.1
+version: 68.2.0
 appVersion: v0.79.2
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus

charts/kube-prometheus-stack/values.yaml

@@ -708,7 +708,7 @@ alertmanager:
     image:
       registry: quay.io
       repository: prometheus/alertmanager
-      tag: v0.27.0
+      tag: v0.28.0
       sha: ""
 
     ## If true then the user will be responsible to provide a secret with alertmanager configuration