Merge pull request #18828 from unoplatform/mergify/bp/release/stable/…

…5.5/pr-18816

Update why-uno-platform.md (backport #18816)

doc/articles/concepts/overview/why-uno-platform.md

@@ -14,6 +14,10 @@ At the core is a cross-platform .NET UI framework, that allows apps to run every
 
 However, built on top of this foundation is also a rich platform which includes libraries, extensions, and tools that accelerate the design, development, and testing of cross-platform applications.
 
+## Hot Design - The only Visual Designer for cross-platform .NET Applications
+
+Uno Platform offers Hot Design, industry's first and only runtime Visual Designer for cross-platform .NET Applications. It transforms your running app into a Designer from any IDE on any OS. This offers unprecedented productivity gains. Learn more about [Hot Design](https://platform.uno/hot-design/)
+
 ## True Single Project for 9 Platform Targets across Mobile, Web, Desktop, and Embedded
 
 Our Single Project approach is .NET ecosystem’s first and only true Single Project solution, empowering developers with a unified approach across all 9 platform targets, spanning mobile, web, desktop, and embedded apps. This genuine Single Project approach simplifies development, accelerates build times, and facilitates platform-specific development, enhancing your productivity and efficiency.