Add Ballerina language to the list of repositories (#651)

* Add Ballerina language to the list of repositories

* Add Ballerina language to the list of repositories

Author: anupama-pathirage

data/repositories.toml

@@ -68,6 +68,7 @@ repositories = [
   'github.com/babel/babel',
   'github.com/badges/shields',
   'github.com/ballercat/walt',
+  'github.com/ballerina-platform/ballerina-lang',
   'github.com/bancodobrasil/stop-analyzing-api',
   'github.com/bancodobrasil/stop-analyzing-embed',
   'github.com/bastion-rs/bastion',