Fix Python version in PyPI description (#648)

Author: rhugonnet

setup.cfg

@@ -20,9 +20,9 @@ classifiers =
     Topic :: Scientific/Engineering :: Image Processing
     Topic :: Scientific/Engineering :: Information Analysis
     Programming Language :: Python
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Programming Language :: Python :: 3
     Topic :: Software Development :: Libraries :: Python Modules
     Typing :: Typed