[GRASS-git] [OSGeo/grass] c0f244: Update v.category.html (#607)

[積丹尼 Dan Jacobson]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: c0f244d1bbdb1cfacd91ca7d119a512336f18aa1
      https://github.com/OSGeo/grass/commit/c0f244d1bbdb1cfacd91ca7d119a512336f18aa1
  Author: 積丹尼 Dan Jacobson <jidanni at jidanni.org>
  Date:   2020-05-18 (Mon, 18 May 2020)

  Changed paths:
    M vector/v.category/v.category.html

  Log Message:
  -----------
  Update v.category.html (#607)

Fix grammar.