Add Oscon 2019 OpenFaaS slides

Add Unlocking your serverless functions with OpenFaaS for AI chatbot projects presentation to the .community.md

We need to add this presentation for #events-in-2019

Signed-off-by: Sergio Méndez <sergioarm.gpl@gmail.com>

community.md

@@ -96,7 +96,7 @@ It would be great to hear from you especially if you have any of the above and w
 | [Docker and serverless: meetup](https://events.docker.com/events/details/docker-randstad-presents-docker-and-serverless/#/) | Edward Wilde | Utrecht, Netherlands | 24-Jan-2019 |
 | Docker Paraguay Meetup Enero 2019 | Patricio Diaz | Asuncion, PY | 04-Jan-2019 |
 | [Cloud Native Edinburgh](https://www.slideshare.net/mobile/KeiranSmith4/open-faas-and-linkerd) | Keiran Smith (@CLI) | Edinburgh Scotland | 16-Jul-2019 |
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+| [Unlocking your serverless functions with OpenFaaS for AI chatbot projects](https://conferences.oreilly.com/oscon/oscon-or-2019/public/schedule/detail/76105) | Sergio Méndez @sergioarmgpl | OSCON, Portland Oregon | 17-Jul-2019 |
 
 #### Blog posts and write-ups 2019
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