Fix the urls on PyPI (#1229)

Previous way of specifying the url does not display the repository:


![image](https://github.com/microsoft/onnxscript/assets/11205048/348a68fe-fee9-42f0-9e81-4932e67ad2f9)

setup.py

@@ -17,6 +17,7 @@
 version = VERSION_FILE.read_text().strip()
 
 project_urls = {
+    "Homepage": "https://onnxscript.ai/",
     "Repository": "https://github.com/microsoft/onnxscript",
 }
 if os.environ.get("ONNX_SCRIPT_RELEASE") != "1":
@@ -32,4 +33,4 @@
         )
 
 # NOTE: Do not include other metadata in setup.py. Put it in pyproject.toml.
-setuptools.setup(version=version, project_urls=project_urls, url="https://onnxscript.ai/")
+setuptools.setup(version=version, project_urls=project_urls)