GH-100894: Updated the doc for sys.winver to clarify its usual contents (GH-100913)

(cherry picked from commit d9dff4c)

Co-authored-by: ram vikram singh <[email protected]>

Author: miss-islington

Doc/library/sys.rst

@@ -1750,7 +1750,7 @@ always available.
 
    The version number used to form registry keys on Windows platforms. This is
    stored as string resource 1000 in the Python DLL.  The value is normally the
-   first three characters of :const:`version`.  It is provided in the :mod:`sys`
+   major and minor versions of the running Python interpreter.  It is provided in the :mod:`sys`
    module for informational purposes; modifying this value has no effect on the
    registry keys used by Python.