Bump pyarrow from 17.0.0 to 18.0.0 (#66)

Bumps [pyarrow](https://github.com/apache/arrow) from 17.0.0 to 18.0.0.
- [Release notes](https://github.com/apache/arrow/releases)
- [Commits](apache/arrow@go/v17.0.0...apache-arrow-18.0.0)

---
updated-dependencies:
- dependency-name: pyarrow
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-docker.txt

@@ -1,5 +1,5 @@
 numpy==2.1.2
 pandas==2.2.3
 xgboost==2.1.2
-pyarrow==17.0.0
+pyarrow==18.0.0
 scikit-learn==1.5.2

requirements.txt

@@ -3,5 +3,5 @@ pandas==2.2.3
 xgboost-cpu==2.1.2; platform_machine == "x86_64"
 xgboost==2.1.2; platform_machine != "x86_64"
 psutil==6.1.0
-pyarrow==17.0.0
+pyarrow==18.0.0
 scikit-learn==1.5.2