Add v0.2.4 changelog

Author: anaynayak

CHANGELOG.md

@@ -2,6 +2,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.2.4] - 2023-06-10
+- Matrix builds for Ruby v3.0 onwards only
+- Remove support for Ruby v2.x
+
 ## [0.2.3] - 2021-07-03
 ### Added
 - Support for Ruby v3

README.md

@@ -117,7 +117,7 @@ aws-security-viz only uses the `ec2:DescribeSecurityGroups` api so a minimal IAM
 
 Alternatively you can use [aws-vault](https://github.com/99designs/aws-vault/) and run it using short lived temporary credentials.
 
-`$ aws-vault exec <profile> -- aws_security_viz -f aws.json --renderer navigator`
+`$ aws-vault exec <profile> -- aws_security_viz -f aws.json --renderer navigator --serve 9091`
 
 #### Advanced configuration