Add cadet to osx_arm64.txt

[ronald-jaepel]

Add https://anaconda.org/conda-forge/cadet to the osx arm64 migration list.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

I checked other merged PRs for additions to the osx_arm64 migration list and they did not include changes to the build number, so I'll do that as well.

Thank you very much for your work on conda-forge!

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.