Add Python 3.14 classifier in setup.py

setup.py

diff --git a/setup.py b/setup.py
index f3a1763..66bf91d 100755
--- a/setup.py
+++ b/setup.py
@@ -55,6 +55,7 @@
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
     ],
     project_urls={
         "Source": "https://github.com/certifi/python-certifi",