ci(tests,docs) Python 3.13

See also: https://docs.python.org/3/whatsnew/3.13.html

Author: tony

Diff for: .github/workflows/docs.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.12']
+        python-version: ['3.13']
     steps:
       - uses: actions/checkout@v4