add conference title

Co-Authored-By: Felix Kunde <felix-kunde@gmx.de>

docs/index.md

@@ -51,7 +51,7 @@ Please, report any issues discovered to https://github.com/zalando/postgres-oper
 
 ## Talks
 
-1. "Building your own PostgreSQL-as-a-Service on Kubernetes" talk by Alexander Kukushkin: [video](https://www.youtube.com/watch?v=G8MnpkbhClc) | [slides](https://static.sched.com/hosted_files/kccna18/1d/Building%20your%20own%20PostgreSQL-as-a-Service%20on%20Kubernetes.pdf)
+1. "Building your own PostgreSQL-as-a-Service on Kubernetes" talk by Alexander Kukushkin, KubeCon NA 2018: [video](https://www.youtube.com/watch?v=G8MnpkbhClc) | [slides](https://static.sched.com/hosted_files/kccna18/1d/Building%20your%20own%20PostgreSQL-as-a-Service%20on%20Kubernetes.pdf)
 
 2. "PostgreSQL and Kubernetes: DBaaS without a vendor-lock" talk by Oleksii Kliukin, PostgreSQL Sessions 2018: [video](https://www.youtube.com/watch?v=q26U2rQcqMw) | [slides](https://speakerdeck.com/alexeyklyukin/postgresql-and-kubernetes-dbaas-without-a-vendor-lock)