Workshops: Fix broken image Introduction to Istio - O'Reilly Live Online Training

[logichub]

Problem

The session thumbnail image is broken on the Introduction to Istio - O'Reilly Live Online Training workshop card (https://layer5.io/workshops/).

Proposed Fix

• [ ] Rename the image name from introduction-to-istio.jp2 to introduction-to-istio.jpg
• [ ] Change the image name in code as pointed out by @subhamkrai in https://github.com/layer5io/layer5/issues/224#issuecomment-549495611

[leecalcote]

Thanks for reporting this, @logichub!

[subhamkrai]

@logichub I think you need to change similar in this file https://github.com/layer5io/layer5/blob/master/collections/_workshops/2019_08_01-introduction_to_istio.md @leecalcote, please correct me if I'm wrong

[leecalcote]

@subhamkrai yes, you're right. I appreciate you triaging these issues. 👍

@logichub, thanks again for reporting this issue and for fixing it in #225!

[logichub]

@subhamkrai Thanks for pointing out this.

@leecalcote Just fixed it through #228