revert changes

Author: ohmayr

.github/workflows/tests.yml

@@ -30,10 +30,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.13
+      - name: Set up Python 3.10
         uses: actions/setup-python@v5
         with:
-          python-version: "3.13"
+          python-version: "3.10"
       - name: Install nox.
         run: python -m pip install nox
       - name: Build the documentation.