Adjust ruamel_yaml version range

[jaimergp]

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.

Sync with defaults and upstream

[conda-forge-linter]

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) and found it was in an excellent condition.

[jaimergp]

I am not sure this is needed after all, ruamel_yaml was only published up to 0.15.x on both conda-forge and defaults 🤷

[beckermr]

Better to have it correct instead of relying on the non-existence of something.

[jakirkham]

Thanks Jaime & Matt! 🙏

Should we do a repodata hotfix too?

[beckermr]

The previous build had a tighter constraint so no need for a hot fix afaik.