Fix broken link - point to list of Pluralsight courses on AngularJS

[sauravbhattacharya001]

AngularJS docs update: Currently, the link to Pluralsight at the bottom of the page https://docs.angularjs.org/guide/external-resources is broken. This will edit the link to a generic list of all AngularJs course on Pluralsight. This is an isolated UI change to a public facing document, therefore there are no breaking changes anticipated.

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Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[sauravbhattacharya001]

I signed it!

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[sauravbhattacharya001]

From the log, there were 2 types of errors:

launcher.sauce - Heartbeat to firefox 47 failed

and

PROXY 127.0.0.1:51852 failed to send half-close

Can someone look into why this might be happening? Also, is it worth considering running doc builds separately?

[gkalpak]

This URL requires the user to sign in. I think we should use https://www.pluralsight.com/search?q=angularjs instead.

[sauravbhattacharya001]

Thank you! I have made the change.