build: re-add 3.12

Author: mbdevpl

.github/workflows/python.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.8', 'pypy3.8', '3.9', 'pypy3.9', '3.10', '3.11']
+        python-version: ['3.8', 'pypy3.8', '3.9', 'pypy3.9', '3.10', '3.11', '3.12.3']
         exclude:
           - os: macos-latest
             python-version: '3.8'