CI: adjust python host version to match for the cross build

Author: lazka

.github/workflows/mingw.yml

@@ -185,7 +185,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.12'
+          python-version: '3.13'
 
       - name: Check Python Version
         run: |
@@ -255,7 +255,7 @@ jobs:
           apt-get install -qqy software-properties-common
           add-apt-repository --yes ppa:deadsnakes/ppa
           apt-get update -qq
-          apt-get install -qqy autoconf-archive python3.12-dev python3.12
+          apt-get install -qqy autoconf-archive python3.13-dev python3.13
 
       - name: Build
         run: |