docs: Add link to LambdaConf presentation

Author: jakubjanecek

README.md

@@ -29,6 +29,8 @@ sbt new avast/sst-seed.g8
 ### Talks
 * [Intro to Scala Server Toolkit](https://www.youtube.com/watch?v=T4xKu2bFUv0) (Functional JVM Meetup, Prague, January 23, 2020)
   * [slides](https://speakerdeck.com/jakubjanecek/intro-to-scala-server-toolkit)
+* [Scala Server Toolkit: How to Write FP Microservice Step-by-step](https://www.youtube.com/watch?v=mQ6_BOucWJg) (LambdaConf 2020 Global Edition, online, June 23, 2020)
+  * [slides](https://speakerdeck.com/jakubjanecek/scala-server-toolkit-how-to-write-fp-microservice-step-by-step)
 
 ## Design