Recipe updates for v3.8.1

[trexfeathers]

Checklist

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

This diff should demonstrate that the recipe has the MINIMUM differences with v3.8.0 (i.e. it restores the new BSD licence and has the latest dependency pins):

https://github.com/conda-forge/iris-feedstock/compare/8eb6ea037db1012f7e6d7d978a3b7ca02edae941...0a1cf1b7b25b5b82463b151383fc5b4be7efd270

[trexfeathers]

@conda-forge-admin, please rerender

[conda-forge-webservices[bot]]

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.