fix broken links - gitpitch shutdown

content/learn/tutorials.md

@@ -43,8 +43,8 @@ layout: "overview"
 * [Workshop on urban growth modeling with FUTURES](https://grasswiki.osgeo.org/wiki/Workshop_on_urban_growth_modeling_with_FUTURES)
 * [Spatio-temporal data handling and visualization in GRASS GIS](http://ncsu-geoforall-lab.github.io/grass-temporal-workshop/)
 * [Temporal data processing](https://grasswiki.osgeo.org/wiki/Temporal_data_processing)
-* [Course on Time series processing with GRASS GIS](https://gitpitch.com/veroandreo/grass-gis-conae/master?p=slides/01_general_intro_grass&grs=gitlab#/)
-* [Analyzing space-time satellite data for disease ecology](https://gitpitch.com/veroandreo/grass_opengeohub2019/master?p=slides/tgrass_rstats_disease_ecology#/)
+* [Time series processing with GRASS GIS](https://github.com/veroandreo/grass_opengeohub2019/blob/master/pdf/tgrass_lst.pdf)
+* [Analyzing space-time satellite data for disease ecology](https://github.com/veroandreo/grass_opengeohub2019/blob/master/pdf/tgrass_rstats_disease_ecology.pdf)
 * [actinia tutorial at OpenGeoHub Summer School 2019](https://neteler.gitlab.io/actinia-introduction/)
 * [GRASS GIS courses in OSGeo Resources](https://www.osgeo.org/resources/)
 * [GIS for Designers](https://baharmon.github.io/gis-for-designers)