bpo-41192: Add documentation of undocumented audit events (GH-21308)

diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index a052e72..b33aa81 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -783,6 +783,8 @@
 
    .. impl-detail:: This is the address of the object in memory.
 
+   .. audit-event:: builtins.id id id
+
 
 .. function:: input([prompt])