Add link to R Consortium

Author: Robinlovelace

osgeo-email.md

@@ -7,6 +7,7 @@ Dear OSGeo Incubation Committee,
 We would like to apply, as the 'R-Spatial' community, to become an OSGeo affiliated organisation.
 
 We are a diverse group with a shared interest in developing free and open tools for the reproducible analysis of geographic data. R is a popular and rapidly growing language for statistical computing and 'data science'. It is already part of the OSGeo ecosystem: the OSGeo Live distribution [ships with R](https://github.com/OSGeo/OSGeoLive/blob/master/bin/install_R.sh) and R integrates with established OSGeo projects such as [GRASS GIS](https://grasswiki.osgeo.org/wiki/R_statistics), [SAGA](https://cran.r-project.org/package=RSAGA) and [QGIS](https://docs.qgis.org/3.16/en/docs/). R tutorials (which would benefit from being updated) are listed on the tutorials listed on OSGeo's [old website](http://old.www.osgeo.org/educational_content). We would like to update existing content and create new OSGeo-affiliated tutorials for using R-Spatial software.
+Many R-Spatial projects have support from the [R Consortium](https://www.r-consortium.org/), opening the possibility of stronger links between R and OSGeo at an organisational level.
 
 After a discussion on our GitHub Organisation at [github.com/r-spatial](https://github.com/r-spatial), it is clear that closer links could be mutually beneficial. Collaboration is at the heart of open source software and the R community has a long history. The history of R-GRASS GIS bridges, for example, covers more than [20 years](https://doi.org/10.1016/S0098-3004(00)00057-1) and goes in both directions. R interfaces enable a wide range of people to access OSGeo-supported software from a reproducible command-line interface.