Fix explanation of script tag change

Request Type: docs

How to reproduce: 

Component(s): ngRoute

Impact: small

Complexity: small

This issue is related to: 

**Detailed Description:**



**Other Comments:**

The description says we added "to new tags" which probably was supposed to be "two new tags". But even with that it's a bit confusing because there is one tag added compared to the previous step, that is the tag for `angular-route.js`. I just updated the doc to say this more clearly.