Some html files have an outdated reference of `ui-bootstrap-tpls-2.5.0.js`

The following line of code:

```html

```

is found in several files. This is an outdated reference and needs to be updated.

Please replace all instances with the following line of code to use the latest CDN link:

```html

```

e.g.
https://github.com/GoogleCloudPlatform/training-data-analyst/blob/1977ae1245d6af82c700db0aa93505135b811b96/courses/developingapps/v1.3/python/appengine/end/frontend/quiz/webapp/static/client/index.html#L52