Pin ckzg <2

[kclowes]

What was wrong?

ckzg v2 breaks some of our tests, so need to pin to <2 so that we're all green.

How was it fixed?

pinned ckzg, and pulled in the windows wheel fix, also had to fix a regex on a test.

Todo:

• [x] Clean up commit history
• [x] Add or update documentation related to these changes
• [x] Add entry to the release notes

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