Update setuptools requirement from ~=75.5.0 to ~=75.6.0

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v75.5.0...v75.6.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -52,7 +52,7 @@ requires = [
     # We build against the most recent supported NumPy 2.0 release;
     # see https://github.com/numpy/numpy/issues/27265
     "numpy~=2.0",
-    "setuptools~=75.5.0",
+    "setuptools~=75.6.0",
 ]
 build-backend = "setuptools.build_meta"