IDLE: adjust Python version in doc url for 3.10+ (GH-28228)


Expression 'python_version()[:3]' truncated '3.10.0' to '3.1' instead of '3.10'.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
(cherry picked from commit b74c819fab86bedc9b962ea42cfb9b5893fd2dda)

Co-authored-by: giovanniwijaya <16949408+giovanniwijaya@users.noreply.github.com>
1 file changed