[GRASS-git] [OSGeo/grass] 1285a6: Update r.walk.html

[Michael Barton]

  Branch: refs/heads/cmbarton-rwalk-frictionmap
  Home:   https://github.com/OSGeo/grass
  Commit: 1285a69491c7c7c14766701aa31dfbe880520fa9
      https://github.com/OSGeo/grass/commit/1285a69491c7c7c14766701aa31dfbe880520fa9
  Author: Michael Barton <cmbarton at users.noreply.github.com>
  Date:   2023-11-30 (Thu, 30 Nov 2023)

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

  Log Message:
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  Update r.walk.html

Add text to clarify friction map requirements and values.