Bump polars from 0.18.11 to 0.18.12 (#569)

Bumps [polars](https://github.com/pola-rs/polars) from 0.18.11 to
0.18.12.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pola-rs/polars/commit/bfabdd50639b271da45027809cf720771e3c6685"><code>bfabdd5</code></a>
python polars 0.18.12 (<a
href="https://redirect.github.com/pola-rs/polars/issues/10304">#10304</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/93454a30b2df73620f3093c8a760d5e3faf357c3"><code>93454a3</code></a>
fix(rust, python): clear window cache and run windows on proper runners
(<a
href="https://redirect.github.com/pola-rs/polars/issues/10303">#10303</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/42a4347cc84fd304fd72405a2277751b8c51e04e"><code>42a4347</code></a>
chore: Update CODEOWNERS (<a
href="https://redirect.github.com/pola-rs/polars/issues/10261">#10261</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/37426f4a016594383815e9b52789d452a59df4ec"><code>37426f4</code></a>
docs(python): add note about pyarrow partitioning (<a
href="https://redirect.github.com/pola-rs/polars/issues/10297">#10297</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/1e1fd1dbe608f64946cc8187f02cc82956229523"><code>1e1fd1d</code></a>
feat(rust, python): Add <code>str.extract_groups</code> (<a
href="https://redirect.github.com/pola-rs/polars/issues/10179">#10179</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/6874e2f13d14c3d9179767521e9a2b6fd2917b11"><code>6874e2f</code></a>
depr(python,rust!): renaming <code>approx_unique</code> as
<code>approx_n_unique</code> (<a
href="https://redirect.github.com/pola-rs/polars/issues/10290">#10290</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/a566346e8cc01147b19e6c09fddd9f24ff24abae"><code>a566346</code></a>
docs(rust): avoid outputting docs of dependencies (<a
href="https://redirect.github.com/pola-rs/polars/issues/10292">#10292</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/989ac8a72b9a719456f433d50edb1bb86c84dda3"><code>989ac8a</code></a>
fix(rust, python): fix sorted fast path in streaming groupby wrt nulls
(<a
href="https://redirect.github.com/pola-rs/polars/issues/10289">#10289</a>)</li>
<li><a
href="https://github.com/pola-rs/polars/commit/36833440ac1b86b25ea670b7a18f5b65b0c232f1"><code>3683344</code></a>
fix(python): Fix interchange protocol allowing copy even when
<code>allow_copy</code> wa...</li>
<li><a
href="https://github.com/pola-rs/polars/commit/1bbe101aa403f420f9d3d6926d5c720bc4861e72"><code>1bbe101</code></a>
fix(rust, python): fix nan aggregation in groupby (<a
href="https://redirect.github.com/pola-rs/polars/issues/10287">#10287</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/pola-rs/polars/compare/py-0.18.11...py-0.18.12">compare
view</a></li>
</ul>
</details>
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</details>

Author: Marenz

pyproject.toml

@@ -54,7 +54,7 @@ dev-docstrings = [
   "darglint == 1.8.1",
   "tomli == 2.0.1",      # Needed by pydocstyle to read pyproject.toml
 ]
-dev-examples = ["polars == 0.18.11"]
+dev-examples = ["polars == 0.18.12"]
 dev-formatting = ["black == 23.7.0", "isort == 5.12.0"]
 dev-mkdocs = [
   "mike == 1.1.2",