Version 1.2.2

• Update now installs the new version by itself, however the program was installed (zip, git, pip, pipx, uv).
• Copies installed with pip, pipx or git at 1.2.1 or older: update them by hand once
  (pipx upgrade neural-network-digits or git pull), then it is automatic.
• The window has its own icon (a small neural network) instead of the Python one, and on Windows the taskbar
  no longer groups it with the other Python programs.
• Strength of the corrections per layer shows the correction of a single weight on average: before, the
  big layers looked stronger just because they have more weights, and the order of the layers was often
  reversed. Found by u/quietgradient (#13).
• The texts on the initial weights and the README experiments say what the charts really show
  (x0.1 with sigmoid, x5 with relu).