Bump pandas from 2.1.0 to 2.1.1

Bumps [pandas](https://github.com/pandas-dev/pandas) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Commits](pandas-dev/pandas@v2.1.0...v2.1.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -2,7 +2,7 @@ beautifulsoup4==4.12.2
 black==23.9.1
 matplotlib==3.8.0
 numpy==1.26.0
-pandas==2.1.0
+pandas==2.1.1
 scikit-learn==1.3.0
 seaborn==0.12.2
 gensim==4.3.2