MNT: Drop beta pin with numpy 1.26.0 release [build wheels]

Author: effigies

pyproject.toml

@@ -1,8 +1,6 @@
 [build-system]
 requires = [
   "setuptools",
-  # Beta release for testing 3.12 builds
-  "numpy==1.26.0b1; python_version > '3.11'",
   # Numpy 1.25 allows back-compiling and supports 3.9
   "numpy>=1.25; python_version >= '3.9'",
   # Last version to support 3.6-3.8