Revise support details for Next.js features

Updated support status for Partial Prerendering and Composable Caching.

Author: iSaulX

src/content/docs/workers/framework-guides/web-apps/nextjs.mdx

@@ -51,9 +51,9 @@ Most Next.js features are supported by the Cloudflare OpenNext adapter:
 | Response streaming                    | 🟢 supported         |                                                                              |
 | asynchronous work with `next/after`   | 🟢 supported         |                                                                              |
 | Middleware                            | 🟢 supported         |                                                                              |
-| Image optimization                    | 🟢 supported         | Supported via [Cloudflare Images](/images/) |
-| Partial Prerendering (PPR)            | 🟢 supported         | PPR is experimental in Next.js                                               |
-| Composable Caching ('use cache')      | 🟢 supported         | Composable Caching is experimental in Next.js                                |
+| Image optimization                    | 🟢 supported         | Supported via [Cloudflare Images](/images/)                                  |
+| Partial Prerendering (PPR)            | 🟢 supported         |                                                                              |
+| Composable Caching ('use cache')      | 🟢 supported         |                                                                              |
 | Node.js in Middleware                 | ⚪ not yet supported | Node.js middleware introduced in 15.2 are not yet supported                  |
 
 ## Deploy a new Next.js project on Workers