Document the experimental defer prop

Author: aurorascharff

src/content/reference/react/Suspense.md

@@ -26,6 +26,7 @@ title: <Suspense>
 #### Props {/*props*/}
 * `children`: The actual UI you intend to render. If `children` suspends while rendering, the Suspense boundary will switch to rendering `fallback`.
 * `fallback`: An alternate UI to render in place of the actual UI if it has not finished loading. Any valid React node is accepted, though in practice, a fallback is a lightweight placeholder view, such as a loading spinner or skeleton. Suspense will automatically switch to `fallback` when `children` suspends, and back to `children` when the data is ready. If `fallback` suspends while rendering, it will activate the closest parent Suspense boundary.
+* <ExperimentalBadge /> **optional** `defer`: A boolean. When `true`, React may show the `fallback` first and render or stream `children` later, even when nothing in them suspends. Use it for content that is expensive to render. Defaults to `false`.
 
 #### Caveats {/*caveats*/}
 
@@ -48,7 +49,7 @@ A Suspense boundary waits for its content to be ready before revealing it. Any o
 - Waiting for a large boundary's HTML to arrive during streaming server rendering. Sending HTML takes time, so a boundary with enough content activates even when nothing in it suspends. React reveals the content as the HTML arrives.
 - <CanaryBadge /> Loading fonts. Suspense doesn't wait for fonts by default, but a [`<ViewTransition>`](/reference/react/ViewTransition) update waits for new fonts to load, up to a timeout, so text doesn't flash with a fallback font. [See an example below.](#waiting-for-a-font-to-load)
 - <CanaryBadge /> Loading images. Suspense doesn't wait for images by default, but during a [`<ViewTransition>`](/reference/react/ViewTransition) update, React blocks the boundary until the image loads, up to a timeout. Adding an `onLoad` handler opts a specific image out. [See an example below.](#waiting-for-an-image-to-load)
-- <ExperimentalBadge /> Performing CPU-bound render work inside a `<Suspense>` boundary marked with the `defer` prop.
+- <ExperimentalBadge /> Performing CPU-bound render work inside a [`<Suspense defer>`](#props) boundary.
 
 <Note>