docs: update modulepreload docs with latest browser support (#10313)

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Co-authored-by: Willow (GHOST) <ghostdevbusiness@gmail.com>

packages/kit/src/exports/public.d.ts

@@ -454,7 +454,7 @@ export interface KitConfig {
 		/**
 		 * SvelteKit will preload the JavaScript modules needed for the initial page to avoid import 'waterfalls', resulting in faster application startup. There
 		 * are three strategies with different trade-offs:
-		 * - `modulepreload` - uses `<link rel="modulepreload">`. This delivers the best results in Chromium-based browsers, but is currently ignored by Firefox and Safari (though support is coming to Safari soon).
+		 * - `modulepreload` - uses `<link rel="modulepreload">`. This delivers the best results in Chromium-based browsers, in Firefox 115+, and Safari 17+. It is ignored in older browsers.
 		 * - `preload-js` - uses `<link rel="preload">`. Prevents waterfalls in Chromium and Safari, but Chromium will parse each module twice (once as a script, once as a module). Causes modules to be requested twice in Firefox. This is a good setting if you want to maximise performance for users on iOS devices at the cost of a very slight degradation for Chromium users.
 		 * - `preload-mjs` - uses `<link rel="preload">` but with the `.mjs` extension which prevents double-parsing in Chromium. Some static webservers will fail to serve .mjs files with a `Content-Type: application/javascript` header, which will cause your application to break. If that doesn't apply to you, this is the option that will deliver the best performance for the largest number of users, until `modulepreload` is more widely supported.
 		 * @default "modulepreload"