Update Python version to 3.13 for modal deploy

Author: Mark Saroufim

.github/workflows/modal-deploy.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.13"
 
       - name: Install Modal
         run: |