Minor release is the quarter number

Author: pfmoore

docs/html/development/release-process.rst

@@ -19,8 +19,7 @@ no changes, then that release month is skipped and the next release will be
 3 months later.
 
 The version number of pip is ``YY.N``, where ``YY`` is the year of the release
-and ``N`` identifies which release of the year (0=January, 1=April, 2=July, and
-3=October).
+and ``N`` identifies the quarter of the year (0-3).
 
 The release manager may, at their discretion, choose whether or not there
 will be a pre-release period for a release, and if there is may extend that