Update components/frames.mdx

Author: mintlify[bot]

components/frames.mdx

@@ -12,7 +12,7 @@ Use frames to display images, diagrams, or other visual content with consistent
 
 ## Captions
 
-You can add additional context to an image using the optional `caption` prop.
+Add text that appears as part of the frame, centered below the content, using the optional `caption` prop.
 
 <Frame caption="Yosemite National Park is visited by over 3.5 million people every year">
   <img src="https://mintlify-assets.b-cdn.net/yosemite.jpg" alt="Photograph of Yosemite Valley." />