Fix pkgdown configuration for reference

[maelle]

Some topics are missing from the configuration file.

 Error in check_missing_topics(rows, pkg) : 
  All topics must be included in reference index
• Missing topics: diversity-metrics, mean, prop, var_range, winmove-class

Note that for topics you do not want to include in the index you can create an "internal" section https://pkgdown.r-lib.org/reference/build_reference.html?q=internal#missing-topics

You can also use the @keywords internal tag and redocument for, say, the package manual page.

To check all topics are listed, after editing the configuration file you can run pkgdown::check_pkgdown().

[maelle]

@laurajanegraham

[maelle]

@laurajanegraham kind reminder 😸

[maelle]

fixed by 398ce4e