build: move homepage spec

Author: MilesCranmer

pyproject.toml

@@ -6,9 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "juliacall"
 version = "0.9.23"
 description = "Julia and Python in seamless harmony"
-readme = "README.md"
-readme-content-type = "text/markdown"
-homepage = "http://github.com/JuliaPy/PythonCall.jl"
+readme = { file = "README.md", content-type = "text/markdown" }
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: MIT License",