BLD: Pin cython for 37-locale build

[TomAugspurger]

Seeing if this resolves the build failure.

xref #34704

[jorisvandenbossche]

Also the Checks and Docs github action builds are failing, and those use the main environment.yml I think?

[WillAyd]

Thanks @TomAugspurger

[WillAyd]

Though looks like we still have this pinned here:

pandas/ci/deps/azure-37-numpydev.yaml

Line 17 in 08febd2

- cython==0.29.16 # GH#34014

I can push a follow up PR. We might not even need that any more

[jorisvandenbossche]

@meeseeksdev backport to 1.0.x

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

$ git checkout 1.0.x
$ git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

$ git cherry-pick -m1 a1191d6fb2d21631e1d4fb2c558d5c66c5ea3bdf

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

$ git commit -am 'Backport PR #34711: BLD: Pin cython for 37-locale build'

4. Push to a named branch :

git push YOURFORK 1.0.x:auto-backport-of-pr-34711-on-1.0.x

5. Create a PR against branch 1.0.x, I would have named this PR:

"Backport PR #34711 on branch 1.0.x"

And apply the correct labels and milestones.

Congratulation you did some good work ! Hopefully your backport PR will be tested by the continuous integration and merged soon!

If these instruction are inaccurate, feel free to suggest an improvement.

[simonjayhawkins]

@jorisvandenbossche will do this next

[WillAyd]

We actually don’t need to backport this can just do #34718