[fvwmorg/fvwm] 6e4fb0: README: correct markdown syntax

[Thomas Adam]

  Branch: refs/heads/master
  Home:   https://github.com/fvwmorg/fvwm
  Commit: 6e4fb093541f263b4bca0231767cc4cd41850a20
      
https://github.com/fvwmorg/fvwm/commit/6e4fb093541f263b4bca0231767cc4cd41850a20
  Author: Thomas Adam <tho...@xteddy.org>
  Date:   2019-08-25 (Sun, 25 Aug 2019)

  Changed paths:
    M README.md

  Log Message:
  -----------
  README: correct markdown syntax