pyproject.toml: Add PyPI Project URLs (#1147)

Author: tony

typing_extensions/pyproject.toml

@@ -10,7 +10,6 @@ version = "4.2.0"
 description = "Backported and Experimental Type Hints for Python 3.7+"
 readme = "README.rst"
 requires-python = ">=3.7"
-urls.Home = "https://github.com/python/typing/blob/master/typing_extensions/README.rst"
 license.file = "LICENSE"
 keywords = [
     "annotations",
@@ -43,6 +42,14 @@ classifiers = [
     "Topic :: Software Development"
 ]
 
+[project.urls]
+Home = "https://github.com/python/typing/blob/master/typing_extensions/README.rst"
+Repository = "https://github.com/python/typing"
+Changes = "https://github.com/python/typing/blob/master/typing_extensions/CHANGELOG"
+Documentation = "https://typing.readthedocs.io/"
+"Bug Tracker" = "https://github.com/python/typing/issues"
+"Q & A" = "https://github.com/python/typing/discussions"
+
 # Project metadata -- authors. Flit stores this as a list of dicts, so it can't
 # be inline above.
 [[project.authors]]