CI: ignore experimental warnings from numba
- [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) 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
```python
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():
```
Yeah, nopython mode do be like that.

Apparently the warning is a numba bug to be fixed in 0.57.1
https://github.com/numba/numba/issues/8936. thanks for the quick review

this fixes the docs build, so merging Can't Dooooo.... It seem like this is already backported (commit is empty).I won't do anything. MrMeeseeks out. > Can't Dooooo.... It seem like this is already backported (commit is empty).I won't do anything. MrMeeseeks out.

u wot m8 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