update ci to python 3.13

Author: peter-urban

.github/workflows/ci-mac.yml

@@ -69,7 +69,7 @@ jobs:
 
     - uses: actions/setup-python@v3
       with:
-        python-version: '3.12'
+        python-version: '3.13'
 
     # - name: Install LLVM and Clang
     #   uses: KyleMayes/install-llvm-action@v2

.github/workflows/ci-windows.yml

@@ -87,7 +87,7 @@ jobs:
     - name: setup python
       uses: actions/setup-python@v3
       with:
-        python-version: '3.12'
+        python-version: '3.13'
 
     # make sure meson can find msvc
     - uses: TheMrMilchmann/setup-msvc-dev@v2