CI: Disable testing on Python 3.12

Author: amotl

.github/workflows/tests.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-20.04, macos-latest, windows-latest]
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]  # "3.12-dev"
         exclude:
 
           # Breaks on building `winsdk`

setup.py

@@ -197,7 +197,6 @@
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
-        "Programming Language :: Python :: 3.12",
         "Topic :: Communications",
         "Topic :: Education",
         "Topic :: Internet",