Update lint.yml

New Python so the CI is actually able to run

.github/workflows/lint.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.12
 
       - name: Install Python dependencies
         run: pip install black