.github: Use python3.13 for testing

Signed-off-by: Lukáš Doktor <[email protected]>

Author: ldoktor

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9]
+        python-version: [3.13]
       fail-fast: false
     steps:
       - uses: actions/checkout@v2