Updating the readme to reflect mature support
Updating the readme to reflect mature support

Support for the templates that were released through this repo have been moved to Mature Support.
pshowalter/solutions-geoprocessing-toolbox,pshowalter/solutions-geoprocessing-toolbox,Esri/solutions-geoprocessing-toolbox,pshowalter/solutions-geoprocessing-toolbox,jfrygeo/solutions-geoprocessing-toolbox,jfrygeo/solutions-geoprocessing-toolbox,jfrygeo/solutions-geoprocessing-toolbox