Update README.md

Added a fallacy of distributed computing (observability is optional), so readers know why they should care about observability, at all. It's coined by one of the thought leaders in software architecture Mark Richards.


Here you can briefly familiarize yourself with this fallacy: 
https://youtu.be/UDtQgXDfkO8


And you can read about it further on these two books: https://a.co/d/4Tsadn3 https://a.co/d/9GFrPtC

README.md

@@ -9,6 +9,8 @@ Welcome to the `AWS Observability Accelerator for CDK`!
 The AWS Observability Accelerator for CDK is a set of opinionated modules
 to help you set up observability for your AWS environments with AWS Native services and AWS-managed observability services such as Amazon Managed Service for Prometheus,Amazon Managed Grafana, AWS Distro for OpenTelemetry (ADOT) and Amazon CloudWatch.
 
+One of the fallacies of distributed computing is that observability is optional. It's a prevalent but wrong assumption. To have a reliable and changeable system, you need to have proper observability in place. And this project aims to help you.
+
 AWS Observability Accelerator for CDK provides patterns with:
 
 - [x] Curated metrics with CloudWatch Container Insights