deps: unpin pydantic (#1793)

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Revert of #1737
pydantic release a fix in 2.12.3 which will be automatically used by
resolver (see simliar in pyiceberg,
apache/iceberg-python#2635)

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Author: kevinjqliu

bindings/python/pyproject.toml

@@ -49,7 +49,7 @@ include = [
 ignore = ["F403", "F405"]
 
 [tool.hatch.envs.dev]
-dependencies = ["maturin>=1.0,<2.0", "pytest>=8.3.2", "datafusion==49.*", "pyiceberg[sql-sqlite,pyarrow]>=0.10.0", "fastavro>=1.11.1", "pydantic<2.12.0"]
+dependencies = ["maturin>=1.0,<2.0", "pytest>=8.3.2", "datafusion==49.*", "pyiceberg[sql-sqlite,pyarrow]>=0.10.0", "fastavro>=1.11.1"]
 
 [tool.hatch.envs.dev.scripts]
 build = "maturin build --out dist --sdist"