Updated CONTRIBUTING.md in line with new translation workflow.
Updated CONTRIBUTING.md in line with new translation workflow.

hotosm/learnosm,jmarlena/learnosm-ux-staging-site,feyeandal/test,furaidochikin/learnosm,Nick-Tallguy/Nick-Tallguy.github.io,Anwaario/Nick-Tallguy.github.io,furaidochikin/learnosm,jmarlena/learnosm-ux-staging-site,hotosm/learnosm,Nick-Tallguy/Nick-Tallguy.github.io,Anwaario/Nick-Tallguy.github.io,feyeandal/test,althio/learnosm,jmarlena/learnosm,jmarlena/learnosm-ux-staging-site,Nick-Tallguy/Nick-Tallguy.github.io,furaidochikin/learnosm,Anwaario/Nick-Tallguy.github.io,feyeandal/test,jmarlena/learnosm-ux-staging-site,hotosm/learnosm,jmarlena/learnosm,Nick-Tallguy/Nick-Tallguy.github.io,althio/learnosm,hotosm/learnosm,jmarlena/learnosm,Nick-Tallguy/Nick-Tallguy.github.io,feyeandal/test,althio/learnosm,jmarlena/learnosm,furaidochikin/learnosm,Anwaario/Nick-Tallguy.github.io,althio/learnosm