[GRASS-git] [OSGeo/grass-addons] a89474: Update i.spec.sam.html (#986)

[Yann Chemin]

  Branch: refs/heads/grass8
  Home:   https://github.com/OSGeo/grass-addons
  Commit: a894742e32793bc4f9cb003e8657dfcfd7fdfb18
      https://github.com/OSGeo/grass-addons/commit/a894742e32793bc4f9cb003e8657dfcfd7fdfb18
  Author: Yann Chemin <dr.yann.chemin at gmail.com>
  Date:   2023-12-13 (Wed, 13 Dec 2023)

  Changed paths:
    M src/imagery/i.spec.sam/i.spec.sam.html

  Log Message:
  -----------
  Update i.spec.sam.html (#986)

Added the description for the input matrix file containing the signatures (copied shamelessly from i.spec.unmix manual)