bump python version in actions/tox to 3.10 (#159)

Author: mandar242

.github/actions/tox/action.yml

@@ -50,7 +50,7 @@ runs:
     - name: setup python
       uses: actions/setup-python@v4
       with:
-        python-version: "3.9"
+        python-version: "3.10"
 
     - name: Install tox
       run: pip install -U tox