Update pydantic requirement from <=2.9.2 to <=2.11.9

Updates the requirements on [pydantic](https://github.com/pydantic/pydantic) to permit the latest version.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/v2.11.9/HISTORY.md)
- [Commits](pydantic/pydantic@v0.0.2...v2.11.9)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-version: 2.11.9
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -35,7 +35,7 @@ dependencies = [
     "mp-api==0.41.2",
     "numpy>=1.26.4",
     "pydantic-core<=2.23.4",
-    "pydantic<=2.9.2",
+    "pydantic<=2.11.9",
     "pymatgen>=2024.3.1",
     "tqdm>=4.67.0",
 ]