Add UI Kit Theming link on new line in builder-settings Theme section

Author: juhi-saha

chat-builder/nextjs/builder-settings.mdx

@@ -188,7 +188,10 @@ Customize colors, fonts, and theme appearance.
 
 <Tip>
   Use `theme: "system"` to automatically match the user's device preference.
-  Test your `brandColor` in both light and dark modes for contrast.
+  Preview your `brandColor` in both light and dark modes for contrast.
+
+[Learn more about UI Kit Theming](/ui-kit/react/theme) for additional customizations.
+
 </Tip>
 
 ### 4.2 Color

chat-builder/react-router/builder-settings.mdx

@@ -188,7 +188,10 @@ Customize colors, fonts, and theme appearance.
 
 <Tip>
   Use `theme: "system"` to automatically match the user's device preference.
-  Test your `brandColor` in both light and dark modes for contrast.
+  Preview your `brandColor` in both light and dark modes for contrast.
+
+[Learn more about UI Kit Theming](/ui-kit/react/theme) for additional customizations.
+
 </Tip>
 
 ### 4.2 Color

chat-builder/react/builder-settings.mdx

@@ -188,7 +188,10 @@ Customize colors, fonts, and theme appearance.
 
 <Tip>
   Use `theme: "system"` to automatically match the user's device preference.
-  Test your `brandColor` in both light and dark modes for contrast.
+  Preview your `brandColor` in both light and dark modes for contrast.
+
+[Learn more about UI Kit Theming](/ui-kit/react/theme) for additional customizations.
+
 </Tip>
 
 ### 4.2 Color