message: feat: document performance benefit of omitting output tree flag
diff: @@ -249,7 +249,7 @@ std::tuple<CliParams, NextalignOptions> parseCommandLine(int argc,
  (
  "T,output-tree",
  - "(optional, string) Path to output Auspice JSON V2 results file. See https://nextstrain.org/docs/bioinformatics/data-formats",
  + "(optional, string) Path to output Auspice JSON V2 results file. If the three is not needed, omitting this flag reduces processing time and memory consumption. For file format description see: https://nextstrain.org/docs/bioinformatics/data-formats",
  cxxopts::value<std::string>(),
  "OUT_TREE"
  )
  