CI: ignore experimental warnings from numba

[MarcoGorelli]

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.
• Added type annotations to new arguments/methods/functions.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

Tried to catch the warning within online_ewma but then I get

numba.core.errors.CompilerError: Failed in nopython mode pipeline (step: Handle with contexts)
Unsupported context manager in use

File "pandas/core/window/online.py", line 58:
    def online_ewma(
        <source elided>
        nobs = (~np.isnan(weighted_avg)).astype(np.int64)
        with warnings.catch_warnings():

[lithomas1]

Yeah, nopython mode do be like that.

Apparently the warning is a numba bug to be fixed in 0.57.1
numba/numba#8936.

[MarcoGorelli]

thanks for the quick review

this fixes the docs build, so merging

[lumberbot-app]

Can't Dooooo.... It seem like this is already backported (commit is empty).I won't do anything. MrMeeseeks out.

[MarcoGorelli]

Can't Dooooo.... It seem like this is already backported (commit is empty).I won't do anything. MrMeeseeks out.

u wot m8

[MarcoGorelli]

ah looks like @mroeschke had already made the same fix, but on the 2.0.x branch https://github.com/pandas-dev/pandas/pull/53372/files

all good then