Update to Python 3.13

Author: TobiX

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.13
 
       - name: Build 64-bit bootloader
         run: |