Update autodoc-pydantic requirement from ==1.9.* to ==2.0.*

Updates the requirements on [autodoc-pydantic](https://github.com/mansenfranzen/autodoc_pydantic) to permit the latest version.
- [Changelog](https://github.com/mansenfranzen/autodoc_pydantic/blob/main/changelog.rst)
- [Commits](mansenfranzen/autodoc_pydantic@v1.9.0...v2.0.1)

---
updated-dependencies:
- dependency-name: autodoc-pydantic
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,3 +1,3 @@
 pallets_sphinx_themes==2.*
 myst-parser==2.0.*
-autodoc_pydantic==1.9.*
+autodoc_pydantic==2.0.*