chore: update classifiers to 3.14

Author: xmatthias

pyproject.toml

@@ -22,6 +22,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Operating System :: MacOS",
     "Operating System :: Unix",
     "Topic :: Office/Business :: Financial :: Investment",