Merge pull request #6 from android10/master

Add new blog post resource.

README.md

@@ -36,6 +36,7 @@ In both cases the filename pattern is `postmortem-*`. For example, if you create
 * [Summary of the Amazon DynamoDB Service Disruption and Related Impacts in the US-East Region](https://aws.amazon.com/message/5467D2/)
 
 ### Postmortem resources
+* [Learn out of mistakes. Postmortems to the rescue.](https://fernandocejas.com/2020/03/21/learn-out-of-mistakes-postmortems/)
 * [A collection of post-mortems](https://github.com/danluu/post-mortems)
 * [Blameless PostMortems and a Just Culture](https://codeascraft.com/2012/05/22/blameless-postmortems/)
 * [A Tale of Postmortems](https://blog.box.com/blog/a-tale-of-postmortems/)