Update model/metrics/dotnet-metrics.yaml

Co-authored-by: Noah Falk <[email protected]>

Author: stevejgordon

model/metrics/dotnet-metrics.yaml

@@ -266,7 +266,7 @@ groups:
     note: >
       Meter name: `System.Runtime`; Added in: .NET 9.0.
 
-      This metric reports the same values as calling
+      This metric reports the same values as counting calls to
       [`AppDomain.CurrentDomain.FirstChanceException`](https://learn.microsoft.com/dotnet/api/system.appdomain.firstchanceexception).
     instrument: counter
     unit: "{exception}"