CI: bump windows python to 3.12

closes: #16473

Signed-off-by: Philip H. <47042125+pheiduck@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: pheiduck

.github/workflows/ci.yml

@@ -417,8 +417,8 @@ jobs:
       PYTHON_VER_DOT: '2.7'
       PYTHON_DIR: 'C:\Python27'
       # Python 3
-      PYTHON3_VER: 311
-      PYTHON3_VER_DOT: '3.11'
+      PYTHON3_VER: 312
+      PYTHON3_VER_DOT: '3.12'
       # Other dependencies
       # winpty
       WINPTY_URL: https://github.com/rprichard/winpty/releases/download/0.4.3/winpty-0.4.3-msvc2015.zip