Bump pandas from 1.5.3 to 2.1.2 in /applications/cls-cad-backend (#21)

Bumps [pandas](https://github.com/pandas-dev/pandas) from 1.5.3 to 2.1.2.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Commits](pandas-dev/pandas@v1.5.3...v2.1.2)

---
updated-dependencies:
- dependency-name: pandas
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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applications/cls-cad-backend/pyproject.toml

@@ -35,7 +35,7 @@ optional = true
 [tool.poetry.group.hypermapper.dependencies]
 hypermapper = "^2"
 plotly = "^5"
-pandas = "^1"
+pandas = "^2"
 
 [tool.poetry.group.dev.dependencies]
 pre-commit = "^3"