Bugfix/Docs-README-Mention-mvn/maven-requirement-for-bioformats_jar

[psobolewskiPhD]

Description

As far as I can tell from testing and googling, the bioformats importer requires not just java but also mvn (maven). See:
tlambert03/bioformats_jar#4 (comment)
https://allencellmodeling.github.io/aicsimageio/aicsimageio.readers.html#aicsimageio.readers.bioformats_reader.BioformatsReader

This PR makes this clear(er): mvn is required in addition to java.
Having java is likely to be fairly common or at least understood, but mvn? I'd never heard of it before this, so I think it's best to explicitly mention it.

Pull request recommendations:

• Name your pull request your-development-type/short-description. Ex: feature/read-tiff-files
• Link to any relevant issue in the PR description. Ex: Resolves [gh-], adds tiff file format support
• Provide relevant tests for your feature or bug fix. N/A
• Provide or update documentation for any feature added by your pull request. N/A

[tlambert03]

thanks @psobolewskiPhD!

[evamaxfield]

Makes sense to me! Thanks @psobolewskiPhD

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b80eb26) 94.03% compared to head (8667ad2) 94.03%.

Additional details and impacted files

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  Coverage   94.03%   94.03%           
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  Files          48       48           
  Lines        4155     4155           
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  Hits         3907     3907           
  Misses        248      248           

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