remove additional typing-extensions pin

Author: svlandeg

.github/workflows/test.yml

@@ -72,7 +72,7 @@ jobs:
         run: pip install --upgrade "pydantic>=1.10.0,<2.0.0"
       - name: Install Pydantic v2
         if: matrix.pydantic-version == 'pydantic-v2'
-        run: pip install --upgrade "pydantic>=2.0.2,<3.0.0" "typing-extensions==4.6.1"
+        run: pip install --upgrade "pydantic>=2.0.2,<3.0.0"
       - name: Lint
         # Do not run on Python 3.7 as mypy behaves differently
         if: matrix.python-version != '3.7' && matrix.pydantic-version == 'pydantic-v2'