Update pandas requirement from ==1.4.* to ==2.2.*

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@v1.4.0.dev0...v2.2.3)

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

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

Author: dependabot[bot]

docker_requirements.txt

@@ -15,7 +15,7 @@ nlpo3==1.3.1
 nltk==3.6.6
 numpy==1.26.*
 OSKut==1.3
-pandas==1.4.*
+pandas==2.2.*
 panphon==0.21.2
 phunspell==0.1.6
 protobuf==5.29.2