Fix summary for StateChange event (#3725)

* Fix event summary

* Update xml/System.Data.Common/DbConnection.xml

Co-Authored-By: Maira Wenzel <[email protected]>

Author: gewarren

xml/System.Data.Common/DbConnection.xml

@@ -1527,12 +1527,12 @@
         <ReturnType>System.Data.StateChangeEventHandler</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>Occurs when the state of the event changes.</summary>
+       <summary>Occurs when the state of the connection changes.</summary>
         <remarks>
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- The <xref:System.Data.Common.DbConnection.StateChange> event occurs when the state of the event changes from closed to opened, or opened to closed.  
+ The <xref:System.Data.Common.DbConnection.StateChange> event occurs when the state of the connection changes from closed to opened or from opened to closed.  
   
  ]]></format>
         </remarks>