[GRASS-PSC] GRASS GIS Flyers updated to new OSGeo branding

[Markus Neteler]

Dear community,

GRASS GIS flyers - updated with the new OSGeo branding and other
improvements - are now available from here:

https://github.com/OSGeo/osgeo/tree/master/marketing/print/one-page-info

The related SVG files are here:
https://github.com/OSGeo/osgeo/tree/master/marketing/collateral/one-page-info/grass-gis

Best
Markus