Update Kill exceptions (#7300)

Author: gewarren

xml/System.Diagnostics/Process.xml

@@ -2421,16 +2421,16 @@ You cannot cause processes on remote computers to exit. You can only view inform
 
  The process is terminating.</exception>
         <exception cref="T:System.NotSupportedException">You are attempting to call <see cref="M:System.Diagnostics.Process.Kill" /> for a process that is running on a remote computer. The method is available only for processes running on the local computer.</exception>
-        <exception cref="T:System.InvalidOperationException">The process has already exited.
+        <exception cref="T:System.InvalidOperationException">.NET Framework and .NET Core 3.0 and earlier versions only: The process has already exited.
 
 -or-
 
 There is no process associated with this <see cref="T:System.Diagnostics.Process" /> object.
 
 -or-
 
-The calling process is a member of the associated process' descendant tree.</exception>
-        <exception cref="T:System.AggregateException">Not all processes in the associated process' descendant tree could be terminated.</exception>
+The calling process is a member of the associated process's descendant tree.</exception>
+        <exception cref="T:System.AggregateException">Not all processes in the associated process's descendant tree could be terminated.</exception>
         <altmember cref="M:System.Environment.Exit(System.Int32)" />
         <altmember cref="M:System.Diagnostics.Process.CloseMainWindow" />
         <altmember cref="M:System.Diagnostics.Process.Start" />