bpo-33944: site: Add site-packages tracing in verbose mode (GH-12110)

diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 7aacd8f..8c65d99 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -369,6 +369,11 @@
    (filename or built-in module) from which it is loaded.  When given twice
    (:option:`!-vv`), print a message for each file that is checked for when
    searching for a module.  Also provides information on module cleanup at exit.
+
+   .. versionchanged:: 3.10
+      The :mod:`site` module reports the site-specific paths
+      and :file:`.pth` files being processed.
+
    See also :envvar:`PYTHONVERBOSE`.