Update docs/core/diagnostics/built-in-metrics.md

Co-authored-by: Genevieve Warren <[email protected]>

Author: wadepickett

docs/core/diagnostics/built-in-metrics.md

@@ -12,8 +12,8 @@ This is a reference for [metrics](metrics.md) built-in for .NET, produced using
 
 - [.NET runtime metrics](built-in-metrics-runtime.md)
 - [.NET extensions metrics](built-in-metrics-diagnostics.md)
-- [ASP.NET Core Metrics](/aspnet/core/log-mon/metrics/built-in)
-- [System.Net Metrics](built-in-metrics-system-net.md)
+- [System.Net metrics](built-in-metrics-system-net.md)
+- [ASP.NET Core metrics](/aspnet/core/log-mon/metrics/built-in)
 - [Entity Framework Core Metrics](/ef/core/logging-events-diagnostics/metrics)
 
 ## Older metric APIs