Add Python 3.15 classifier

Author: remimd

pyproject.toml

@@ -44,6 +44,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.15",
     "Operating System :: OS Independent",
     "Intended Audience :: Developers",
     "Natural Language :: English",