docs: Added docs link for March 2025 What's New - server route resolu… (#1181)

* docs: Added docs link for March 2025 What's New - server route resolution addition

Added the docs link for consistency with other What's New changes and news.

* Update apps/svelte.dev/content/blog/2025-03-01-whats-new-in-svelte-march-2025.md

---------

Co-authored-by: Rich Harris <[email protected]>

Author: rtmorgan

apps/svelte.dev/content/blog/2025-03-01-whats-new-in-svelte-march-2025.md

@@ -13,7 +13,7 @@ But before we dive into that, let's get to some updates!
 
 - Native support for Websockets in SvelteKit is now available for testing! You can install the version of SvelteKit from the PR using pkg.pr.new and the PR number ([How To Install](https://github.com/sveltejs/kit/issues/1491#issuecomment-2645962690), [PR/Docs](https://github.com/sveltejs/kit/pull/12973))
 - `$props.id()` provides SSR-safe ID generation - unique for each instance of a component (**[email protected]**, [Docs](</docs/svelte/$props#$props.id()>), [#15185](https://github.com/sveltejs/svelte/pull/15185))
-- SvelteKit now supports an option for server-side route resolution. This means that instead of loading the whole routing manifest in the client, and doing the route resolution there, the server runtime is invoked for each route request (**[email protected]**, [#13379](https://github.com/sveltejs/kit/pull/13379))
+- SvelteKit now supports an option for server-side route resolution. This means that instead of loading the whole routing manifest in the client, and doing the route resolution there, the server runtime is invoked for each route request (**[email protected]**, [docs](/docs/kit/configuration#router), [pull request](https://github.com/sveltejs/kit/pull/13379))
 - The values for `cache-control` and `content-type` headers are now validated in dev mode to help catch invalid values early (**2.17.0**, [#13114](https://github.com/sveltejs/kit/pull/13114))
 
 For a full list of bug fixes in Svelte, SvelteKit and its adapters, check out their CHANGELOGs [here](https://github.com/sveltejs/svelte/blob/main/packages/svelte/CHANGELOG.md) and [here](https://github.com/sveltejs/kit/tree/main/packages).