mamba requirement is unnecessarily specific

[cmkobel]

https://github.com/bioconda/bioconda-recipes/blob/5fa73332fe5dc656447b3bffef22f8bbdebe6a76/recipes/assemblycomparator2/meta.yaml#L21

Consider loosen to the minor version? Or major?

[cmkobel]

Another perspective is that if mamba is required for assemblycomparator2, then it is not necessary to install it in this launcher environment. Although, I guess it makes things simpler because then it is guaranteed that a compatible version is installed.