Backport PR #47150 on branch 1.4.x (DEPS: Bump Cython)
Backport PR #47150: DEPS: Bump Cython
Numpy Dev failing with `RuntimeError: Cannot cythonize with old Cython version (0.29.24 installed, needs 0.29.30)`. we perhaps are missing a backport somewhere?
 > Numpy Dev failing with `RuntimeError: Cannot cythonize with old Cython version (0.29.24 installed, needs 0.29.30)`. we perhaps are missing a backport somewhere?

https://github.com/pandas-dev/pandas/pull/46029 was not backported.

can either backport that one or change the cython version in ci/deps/actions-310-numpydev.yaml here? > can either backport that one or change the cython version in ci/deps/actions-310-numpydev.yaml here?

looking through the code changes in that PR, probably safer just to change to 0.29.30 in actions-310-numpydev.yaml here and if there is another patch release in 1.4.x we could decide to add Cython 3 support later if deemed necessary. (or just wait for 1.5) Numpy Dev green. other jobs passed on last run. so merging.