[GRASS-git] [OSGeo/grass] 618aca: fix manual page typo from #846

[Markus Neteler]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 618acafef77642d83b8812b7fcab3d2490b81150
      https://github.com/OSGeo/grass/commit/618acafef77642d83b8812b7fcab3d2490b81150
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2020-08-04 (Tue, 04 Aug 2020)

  Changed paths:
    M raster/r.cost/r.cost.html

  Log Message:
  -----------
  fix manual page typo from #846