Raku files not shown in statistics

[rcmlz]

System

tokei --version
tokei 12.1.2 compiled with serialization support: json, cbor, yaml
on MacOS Monterey installed via brew install tokei

Expected behaviour

Process all files with extension .raku, .rakumod, .rakutest, .rakudoc

Observed behaviour

Raku files are ignored

How to reproduce

brew install tokei
git clone https://github.com/rcmlz/perlweeklychallenge-club
cd perlweeklychallenge-club
find challenge-230 -regex ".*.raku.*" -type f
tokei -f -t=Raku ./challenge-230

There are many Raku files, but none is shown.

For e.g. Perl or Python running tokei -f -t=Perl ./challenge-230resp. tokei -f -t=Python ./challenge-230 all seems to work fine.