message: fix: correct the link URL to nextstrain ncov clades
diff: @@ -46,7 +46,7 @@ for details):
  </figure>
  Within Nextstrain, we define each clade by its combination of signature mutations.
  -You can find the exact clade definition in [github.com/nextstrain/ncov](https://github.com/nextstrain/ncov/blob/master/config/clades.tsv).
  +You can find the exact clade definition in [github.com/nextstrain/ncov](https://github.com/nextstrain/ncov/blob/master/defaults/clades.tsv).
  Nextclade assigns your sequences to these clades by checking them for these mutations.
  ### Quality Control (QC)
  