Update README.md

Co-authored-by: M. Fatih Cırıt <xmfcx@users.noreply.github.com>

Author: TakaHoribe

README.md

@@ -1,6 +1,9 @@
 # autoware.universe
 
-Welcome to Autoware.universe! This platform is a pivotal element within the core/universe concept of Autoware, managing a diverse range of packages that extend the core functionalities of autonomous driving.
+## Welcome to Autoware Universe!
+
+Autoware Universe serves as a foundational pillar within the Autoware ecosystem, playing a critical role in enhancing the core functionalities of autonomous driving technologies.
+This repository is a pivotal element of the Autoware Core/Universe concept, managing a wide array of packages that significantly extend the capabilities of autonomous vehicles.
 
 ![autoware_universe_front](docs/assets/images/autoware_universe_front.png)