Update dependency pandas to v2.2.3 (#117)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [pandas](https://pandas.pydata.org)
([source](https://redirect.github.com/pandas-dev/pandas)) | `==2.2.2` ->
`==2.2.3` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/pandas/2.2.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/pandas/2.2.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/pandas/2.2.2/2.2.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pandas/2.2.2/2.2.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>pandas-dev/pandas (pandas)</summary>

###
[`v2.2.3`](https://redirect.github.com/pandas-dev/pandas/releases/tag/v2.2.3):
Pandas 2.2.3

[Compare
Source](https://redirect.github.com/pandas-dev/pandas/compare/v2.2.2...v2.2.3)

We are pleased to announce the release of pandas 2.2.3.
This release includes some new features, bug fixes, and performance
improvements. We recommend that all users upgrade to this version.

See the [full
whatsnew](https://pandas.pydata.org/pandas-docs/version/2.2.3/whatsnew/v2.2.3.html)
for a list of all the changes.
Pandas 2.2.3 supports Python 3.9 and higher.

The release will be available on the defaults and conda-forge channels:

    conda install pandas

Or via PyPI:

    python3 -m pip install --upgrade pandas

Please report any issues with the release on the [pandas issue
tracker](https://redirect.github.com/pandas-dev/pandas/issues).

Thanks to all the contributors who made this release possible.

</details>

---

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---

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---

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2023_PyData_Berlin/requirements.txt

@@ -1,5 +1,5 @@
 numpy==1.26.4
-pandas==2.2.2
+pandas==2.2.3
 matplotlib==3.9.0
 pytest==8.3.2
 flake8==7.0.0