chore: add release notes link to PyPI page (#1568)

Author: adamchainz

setup.py

@@ -205,6 +205,9 @@ def _download_and_extract_local_driver(
     long_description=Path("README.md").read_text(encoding="utf-8"),
     long_description_content_type="text/markdown",
     url="https://github.com/Microsoft/playwright-python",
+    project_urls={
+        "Release notes": "https://github.com/microsoft/playwright-python/releases",
+    },
     packages=["playwright"],
     include_package_data=True,
     install_requires=[