poetry: bump datamodel-code-generator from 0.26.1 to 0.30.1

Bumps [datamodel-code-generator](https://github.com/koxudaxi/datamodel-code-generator) from 0.26.1 to 0.30.1.
- [Release notes](https://github.com/koxudaxi/datamodel-code-generator/releases)
- [Commits](koxudaxi/datamodel-code-generator@0.26.1...0.30.1)

---
updated-dependencies:
- dependency-name: datamodel-code-generator
  dependency-version: 0.30.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]