message: change build url in auspice config
diff: {
  "title": "Your samples placed on a SARS-CoV-2 phylogeny",
  - "build_url": "https://github.com/neherlab/ncov-ecdc",
  + "build_url": "https://github.com/neherlab/webclades",
  "maintainers": [
  {"name": "Ivan Aksamentov", "url": "https://neherlab.org"},
  {"name": "Richard Neher", "url": "https://neherlab.org"}
  