Update ignored files to ignore templates

.github/codeql/codeql-config.yml

@@ -4,6 +4,10 @@ queries:
   - uses: security-and-quality
 
 paths-ignore:
-  - node_modules
+  # Ignore our vendored yarn.js
   - jupyterlab/staging/yarn.js
-
+  # Ignore templates, which generate syntax error warnings
+  - '**/templates/*.html'
+  - examples/federated/core_package/index.js
+  - jupyterlab/staging/index.js
+  - dev_mode/index.js