Fix setup.cfg for setuptools 67.

[hjoliver]

pip install . results in the latest setuptools (version 67) being installed, which rejects bad syntax in setup.cfg: foo>=3.* (the wildcard is only allowed with ==).

This is causing CI to fail on GitHub, and reproduced locally.

Check List

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Applied any dependency changes to both setup.cfg and conda-environment.yml.
• Tests are included (or explain why tests are not needed).
• CHANGES.md entry included if this is a change that can affect users
• Cylc-Doc pull request opened if required at cylc/cylc-doc/pull/XXXX.
• If this is a bug fix, PR should be raised against the relevant ?.?.x branch.

[hjoliver]

(Doh, beaten too it. Duplicate of #5333)