[GRASS-git] [OSGeo/grass-website] f37253: Fixes warning with latest Hugo version

[Nicolas Bozon]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-website
  Commit: f372535464debafca0255c7b7d5e9c7efad50799
      https://github.com/OSGeo/grass-website/commit/f372535464debafca0255c7b7d5e9c7efad50799
  Author: nbozon <nicolas.bozon at cartogenic.com>
  Date:   2020-04-13 (Mon, 13 Apr 2020)

  Changed paths:
    M config.toml
    M themes/grass/layouts/_default/single.html
    M themes/grass/layouts/contribute/contribute.html
    M themes/grass/layouts/download/single.html
    M themes/grass/layouts/learn/books.html
    M themes/grass/layouts/partials/footer.html
    M themes/grass/layouts/partials/head.html
    M themes/grass/theme.toml

  Log Message:
  -----------
  Fixes warning with latest Hugo version

Modifies the GRASS theme according to the latest recommandations by the Hugo community. Removes/replaces deprecated methods and gets rid of the warnings.