Merge pull request #6254 from prometheus/beorn7/mixin

Fix the description template for PrometheusRemoteWriteDesiredShards

documentation/prometheus-mixin/alerts.libsonnet

@@ -228,7 +228,7 @@
             },
             annotations: {
               summary: 'Prometheus remote write desired shards calculation wants to run more than configured max shards.',
-              description: 'Prometheus %(prometheusName)s remote write desired shards calculation wants to run {{ printf $value }} shards, which is more than the max of {{ printf `prometheus_remote_storage_shards_max{instance="%%s",%(prometheusSelector)s}` $labels.instance | query | first | value }}.' % $._config,
+              description: 'Prometheus %(prometheusName)s remote write desired shards calculation wants to run {{ $value }} shards, which is more than the max of {{ printf `prometheus_remote_storage_shards_max{instance="%%s",%(prometheusSelector)s}` $labels.instance | query | first | value }}.' % $._config,
             },
           },
           {