[CI] Pin pydantic in the mypy pre-commit hook (#60894)

Signed-off-by: mgoin <mgoin64@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>

.pre-commit-config.yaml

@@ -205,7 +205,7 @@ repos:
     language: python
     types_or: [python, pyi]
     require_serial: true
-    additional_dependencies: ["mypy==1.20.2", regex, types-cachetools, types-setuptools, types-PyYAML, types-requests, types-torch, pydantic]
+    additional_dependencies: ["mypy==1.20.2", regex, types-cachetools, types-setuptools, types-PyYAML, types-requests, types-torch, "pydantic==2.13.5"]
   - id: png-lint
     name: Lint PNG exports from excalidraw
     entry: tools/pre_commit/png-lint.sh