Update xml/System.Diagnostics.Tracing/EventListener.xml

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

Author: John Salem

xml/System.Diagnostics.Tracing/EventListener.xml

@@ -68,7 +68,7 @@
  When a new event source is created, the <xref:System.Diagnostics.Tracing.EventListener.OnEventSourceCreated%2A> method is called. Every current event listener gets exactly one <xref:System.Diagnostics.Tracing.EventListener.OnEventSourceCreated%2A> call for every current event source that can send it log messages. When an event listener is created, a series of <xref:System.Diagnostics.Tracing.EventListener.OnEventSourceCreated%2A> calls are made to notify the new listener of all the event sources that existed before the listener was created.  
 
 > [!IMPORTANT]
->  When instantiating an `EventListener`, the callbacks to <xref:System.Diagnostics.Tracing.EventListener.OnEventSourceCreated%2A> and <xref:System.Diagnostics.Tracing.EventListener.OnEventWritten%2A> can happen _before_ the constructor has completed. Care must be taken when initializing instance members used in those callbacks.
+> When instantiating an `EventListener`, the callbacks to <xref:System.Diagnostics.Tracing.EventListener.OnEventSourceCreated%2A> and <xref:System.Diagnostics.Tracing.EventListener.OnEventWritten%2A> can happen _before_ the constructor has completed. Take care when you initialize instance members used in those callbacks.
   
  ]]></format>
     </remarks>