bpo-21063: Improve module synopsis for distutils (GH-17363)

diff --git a/Doc/library/zipimport.rst b/Doc/library/zipimport.rst
index 2138697..8ac3fb1 100644
--- a/Doc/library/zipimport.rst
+++ b/Doc/library/zipimport.rst
@@ -2,7 +2,7 @@
 =====================================================
 
 .. module:: zipimport
-   :synopsis: support for importing Python modules from ZIP archives.
+   :synopsis: Support for importing Python modules from ZIP archives.
 
 .. moduleauthor:: Just van Rossum <just@letterror.com>