Merge pull request #269411 from aimee-littleton/patch-192

Update nat-metrics.md

Author: prmerger-automator[bot]

articles/nat-gateway/nat-metrics.md

@@ -176,7 +176,7 @@ Possible reasons for failed connections:
 - A pattern of failed connections can happen for various reasons. See the [NAT gateway connectivity troubleshooting guide](/azure/nat-gateway/troubleshoot-nat-connectivity) to help you further diagnose.
 
 >[!NOTE]
-> When NAT gateway is attached to a subnet and public IP address, the Azure platform verifies NAT gateway is healthy by conducting health checks. These health checks may appear in NAT gateway’s SNAT connection metrics, but are negligible and don’t impact NAT gateway’s ability to connect outbound.
+> When NAT gateway is attached to a subnet and public IP address, the Azure platform verifies NAT gateway is healthy by conducting health checks. The amount of health check related connections may vary as the health check service is optimized, but is negligible and doesn’t impact NAT gateway’s ability to connect outbound.
 
 ### Datapath availability