message: docs: add Nextclade_pango column details
diff: @@ -39,3 +39,5 @@ To keep the reference tree small, Nextclade does not include all early `Pango li
  ## Results
  Clades are reported in the "Clade" column in the results table of [Nextclade Web](../nextclade-web) as well as in the analysis results JSON, CSV and TSV files generated by [Nextclade CLI](../nextclade-cli) and in the "Download" dialog of [Nextclade Web](../nextclade-web).
  +
  +For SARS-CoV-2, Pango lineages are also displayed in the results. In `tsv` and `csv` files, the column is named `Nextclade_pango`.
  