Replace Python 3.14t with Free Threading in pyproject

Author: cclauss

pyproject.toml

@@ -28,7 +28,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
-    "Programming Language :: Python :: 3.14t",
+    "Programming Language :: Python :: Free Threading",
     "Framework :: Django :: 5.0",
     "Framework :: Django :: 5.1",
     "Framework :: Django :: 5.2",