Update cities using MDS

Author: schnuerle

README.md

@@ -137,7 +137,7 @@ The MDS specification is versioned using Git tags and [semantic versioning](http
 
 # Cities Using MDS
 
-More than 115 cities and public agencies around the world use MDS, and it has been implemented by most major [mobility service providers](#providers-using-mds).  
+More than 140 cities and public agencies across 6 continents around the world use MDS, and it has been implemented by most major [mobility service providers](#providers-using-mds).  
 - See our **[list of cities using MDS](https://www.openmobilityfoundation.org/mds-users/#cities-using-mds)** with links to public mobility websites and policy/permit documents.
 
 Please let us know [via our website](https://www.openmobilityfoundation.org/get-in-touch/) or in the [public discussion area](https://github.com/openmobilityfoundation/mobility-data-specification/discussions) if you are an agency using MDS so we can add you to the city resource list, especially if you have published your policies or documents publicly.