Update README.md (link expired) (!1207) · Merge requests · Common Ground / DON / Developer Overheid · GitLab

Johan Groenen requested to merge jgroenen/developer.overheid.nl:patch-1 into master Feb 14, 2020

https://test.developer.overheid.nl/api-toevoegen was expired. Changed to https://developer.overheid.nl/api-toevoegen