Build error with PyYAML 5.4.1

[jdeanwallace]

One of my PR builds started failing all of a sudden with the following error:

ERROR: Could not find a version that satisfies the requirement pyyaml==5.4.1
ERROR: No matching distribution found for pyyaml==5.4.1

I found this issue that suggests the error coincides with the release of Cython 3.

Someone suggested the following fix:

You can also upgrade to 6.0.1, which pins the Cython < 3.0.0.

[mtlynch]

@jdeanwallace - I think your work on #1352 saved customers from encountering this bug in the field. Glad we got that in!

[jdeanwallace]

I think your work on #1352 saved customers from encountering this bug in the field.

*our work

Oh yeah! 🤠