fix: main page what is sunrise link

Author: richardscull

src/content/docs/index.mdx

@@ -11,7 +11,7 @@ hero:
       link: getting-started/installation
       icon: right-arrow
     - text: What is Sunrise?
-      link:  getting-started/installation
+      link:  getting-started/what-is-sunrise
       icon: external
       variant: minimal