Update monitor-prometheus-and-grafana-integration.md

Author: huoyao1125

tidb-cloud/monitor-prometheus-and-grafana-integration.md

@@ -29,7 +29,7 @@ TiDB Cloud has supported the project-level Prometheus integration (Beta) since M
 
 ## Limitation
 
-- Prometheus and Grafana integration now is only available for in [{{{ .dedicated }}}](/tidb-cloud/select-cluster-tier.md#tidb-cloud-dedicated) clusters.
+- Prometheus and Grafana integrations now are only available for [{{{ .dedicated }}}](/tidb-cloud/select-cluster-tier.md#tidb-cloud-dedicated) clusters.
 
 - Prometheus and Grafana integrations are not available when the cluster status is **CREATING**, **RESTORING**, **PAUSED**, or **RESUMING**.