updated changelog file

Author: klezi10

CHANGELOG.md

@@ -56,3 +56,4 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - updated to React 18 and Next.js latest
 - footer styling update + social media icons
 - improved LightHouse scores by optmizing images, creating a robots.txt file and adding proper alt tags
+- updated 'about us' first section (our background, peer reviews, version control)