Increase CortexProvisioningTooManyWrites alert threshold to 160k

Signed-off-by: Narsing Metpally <nmetpally@axon.com>

Author: mvnarsing

cortex-mixin/alerts/alerts.libsonnet

@@ -409,7 +409,7 @@
           alert: 'CortexProvisioningTooManyWrites',
           // 80k writes / s per ingester max.
           expr: |||
-            avg by (%s) (rate(cortex_ingester_ingested_samples_total[1m])) > 80e3
+            avg by (%s) (rate(cortex_ingester_ingested_samples_total[1m])) > 160e3
           ||| % $._config.alert_aggregation_labels,
           'for': '15m',
           labels: {