Yml file apparently needs quotes around '3.10'.

Author: cosinekitty

Diff for: .github/workflows/astronomy-engine-tests.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.10
+        python-version: '3.10'
     - name: Install Python tools
       run: python -m pip install --upgrade pip && pip install mypy
     - name: Install documentation tools Linux