[docs] [issue37149] link to John Shipman's Tkinter 8.5 documentation fails: website no longer available

Change by Terry J. Reedy <tjreedy@udel.edu>: ---------- stage: patch review -> needs patch versions: -Python 3.5 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue37149> _______________________________________