Update RiboDetector meta.yaml

[lucacozzuto]

Hi, I fixed the required version of python since 3.9 and 3.10 seems to have a problem with multi-threadings:

See:

https://github.com/hzi-bifo/RiboDetector/issues/46

Luca

[lucacozzuto]

@BiocondaBot please add label

[lucacozzuto]

@bioconda/core please review & merge

[BiocondaBot]

Reposting for @lucacozzuto to enable pings (courtesy of the BiocondaBot):

@bioconda/core please review & merge

[martin-g]

The last build has failed! Please address the failure and add the review and merge label again! Thanks!