Python: Pin ty to the previous release to fix type check error

Author: tronical

.github/workflows/python_test_reusable.yaml

@@ -45,7 +45,8 @@ jobs:
               run: uv sync
             - name: Run ty
               working-directory: api/python/slint
-              run: uvx ty check
+              # Pin ty to avoid running into https://github.com/astral-sh/ty/issues/3129
+              run: uvx ty@0.0.24 check
             - name: Run ruff linter
               working-directory: api/python/slint
               run: uv tool run ruff check