chore(deps): update pandas requirement from ~=2.1.3 to ~=2.1.4

Updates the requirements on [pandas](https://github.com/pandas-dev/pandas) to permit the latest version.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Commits](pandas-dev/pandas@v2.1.3...v2.1.4)

---
updated-dependencies:
- dependency-name: pandas
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -2,5 +2,5 @@ requests~=2.31.0
 tweepy~=4.14.0
 PyPDF2~=3.0.1
 matplotlib~=3.8.2
-pandas~=2.1.3
+pandas~=2.1.4
 beautifulsoup4~=4.12.2