check for unsave inline script or styles in CI

Author: xi

.github/workflows/test.yml

@@ -220,3 +220,6 @@ jobs:
 
     - name: Test with tox
       run: tox -e docs,style,readme
+
+    - name: check for unsave inline script or styles in templates
+      run: ! grep -r '\(style=\|onclick=\|<script>\|<style\)' debug_toolbar/templates/