[GRASS-git] [OSGeo/grass] 12b5c9: r.carve manual: fix example for stream vector (#968)

[Markus Neteler]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 12b5c945c41c120afe82b2df22ea8365fb6eda24
      https://github.com/OSGeo/grass/commit/12b5c945c41c120afe82b2df22ea8365fb6eda24
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2020-09-21 (Mon, 21 Sep 2020)

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

  Log Message:
  -----------
  r.carve manual: fix example for stream vector (#968)

The example used the `streams` map which is not in the extent of the elevation map `elev_lid792_1m` at all.
The updated example uses a newly digitized line.