Fix typo in site module (GH-17597)

diff --git a/Lib/site.py b/Lib/site.py
index a065ab0..2c71798 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -590,7 +590,7 @@
     Exit codes with --user-base or --user-site:
       0 - user site directory is enabled
       1 - user site directory is disabled by user
-      2 - uses site directory is disabled by super user
+      2 - user site directory is disabled by super user
           or for security reasons
      >2 - unknown error
     """