Bump xgboost from 2.1.0 to 2.1.1 (#54)

Bumps [xgboost](https://github.com/dmlc/xgboost) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/dmlc/xgboost/releases)
- [Changelog](https://github.com/dmlc/xgboost/blob/master/NEWS.md)
- [Commits](dmlc/xgboost@v2.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: xgboost
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements-docker.txt

@@ -1,5 +1,5 @@
 numpy==2.0.1
 pandas==2.2.2
-xgboost==2.1.0
+xgboost==2.1.1
 pyarrow==17.0.0
 scikit-learn==1.5.1

requirements.txt

@@ -1,7 +1,7 @@
 numpy==2.0.1
 optuna==3.6.1
 pandas==2.2.2
-xgboost==2.1.0
+xgboost==2.1.1
 psutil==6.0.0
 pyarrow==17.0.0
 scikit-learn==1.5.1