Update maaslin2 bioconda recipe

[paulzierep]

maaslin2 is a great tool and we are planning to include maaslin2 into Galaxy and using it in comparative-analysis focused trainings.
There is already a wrapper for it, but it needs to be fixed and updated: https://github.com/galaxyproject/tools-iuc/tree/main/tools/maaslin2 - we will do that.
Could you maybe update the bioconda recipe with the newest release: https://github.com/bioconda/bioconda-recipes/blob/master/recipes/maaslin2/meta.yaml
So we can also bump the version in the Galaxy wrapper to provide the users with the newest version.

If you would like to be involved in the planned training or can provide specific scenarios (longitudinal, fixed-effects ... ) you would like to see in the training, please feel free to reach out as well.

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