Log Message:
wm/cwm: Update to 7.4

2023-10-20: Ninth public release 7.4 of portable cwm. Changes made between
OpenBSD 7.3 and 7.4:

- Allow cwm(1) to cycle through windows of the same window class as the active
  window, default key binding to M-grave, respectively Alt-Tilde, like with
  other window managers.