message: doc: adjust url in readme  [skip ci]
diff: @@ -106,7 +106,7 @@ Nextclade
  ---
  <p align="center">
  - <a href="https://github.com/nextstrain/nextclade/releases">
  + <a href="https://clades.nextstrain.org" target="_blank" rel="noopener noreferrer" >
  <img height="50px"
  src="https://img.shields.io/badge/%F0%9F%8C%8E%20Visit%20clades.nextstrain.org-%23aa1718.svg"
  alt="Download button"
  