bpo-37390: Add audit event table to documentations (GH-14406)

Also updates some (unreleased) event names to be consistent with the others.
diff --git a/Doc/library/webbrowser.rst b/Doc/library/webbrowser.rst
index 85e932d..b7bfb65 100644
--- a/Doc/library/webbrowser.rst
+++ b/Doc/library/webbrowser.rst
@@ -64,7 +64,7 @@
    may work and start the operating system's associated program.  However, this
    is neither supported nor portable.
 
-   .. audit-event:: webbrowser.open "url"
+   .. audit-event:: webbrowser.open url webbrowser.open
 
 
 .. function:: open_new(url)