ci: pin setuptools (backport #4085) (#4089)

This is an automatic backport of pull request #4085 done by [Mergify](https://mergify.com).


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Author: mergify[bot]

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools >= 40.6.0", "setuptools_scm[toml] >=4,<6.1", "cython", "cmake >= 3.14", "ninja"]
+requires = ["setuptools >= 40.6.0,<64", "setuptools_scm[toml] >=4,<6.1", "cython", "cmake >= 3.14", "ninja"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]