Minor language change

Author: mattmccleary

articles/azure-monitor/app/opentelemetry-add-modify.md

@@ -376,7 +376,7 @@ The following table represents the currently supported custom telemetry types:
 
 ### Add custom metrics
 
-In this context, custom metrics refers to manually instrumenting your code to collect additional metrics beyond what the OpenTelemetry Instrumentation Libraries collect by default.
+In this context, custom metrics refers to manually instrumenting your code to collect additional metrics beyond what the OpenTelemetry Instrumentation Libraries automatically collect.
 
 The OpenTelemetry API offers six metric "instruments" to cover various metric scenarios and you need to pick the correct "Aggregation Type" when visualizing metrics in Metrics Explorer. This requirement is true when using the OpenTelemetry Metric API to send metrics and when using an instrumentation library.