Update alerts/kube_apiserver.libsonnet

Author: sebastiangaiser

alerts/kube_apiserver.libsonnet

@@ -90,6 +90,7 @@ local utils = import '../lib/utils.libsonnet';
             expr: |||
               sum by(%(clusterLabel)s, instance, name, reason)(increase(aggregator_unavailable_apiservice_total{%(kubeApiserverSelector)s}[1m])) > 0
             ||| % $._config,
+            'for': '10m',
             labels: {
               severity: 'warning',
             },