ci: bump setup-python version to 3.13 (netdata#463)

Author: ilyam8

.github/workflows/checks.yml

@@ -19,7 +19,7 @@ jobs:
 
       - uses: actions/setup-python@v5.3.0
         with:
-          python-version: 3.7
+          python-version: 3.13
 
       - name: Set up chart-testing
         uses: helm/chart-testing-action@v2.6.1