clarify that handle is only called when the server receives a request (…

…sveltejs#4546)

documentation/docs/04-hooks.md

@@ -8,7 +8,7 @@ An optional `src/hooks.js` (or `src/hooks.ts`, or `src/hooks/index.js`) file exp
 
 ### handle
 
-This function runs every time SvelteKit receives a request — whether that happens while the app is running, or during [prerendering](/docs/page-options#prerender) — and determines the response. It receives an `event` object representing the request and a function called `resolve`, which invokes SvelteKit's router and generates a response (rendering a page, or invoking an endpoint) accordingly. This allows you to modify response headers or bodies, or bypass SvelteKit entirely (for implementing endpoints programmatically, for example).
+This function runs every time the SvelteKit server receives a request — whether that happens while the app is running, or during [prerendering](/docs/page-options#prerender) — and determines the response. It receives an `event` object representing the request and a function called `resolve`, which invokes SvelteKit's router and generates a response (rendering a page, or invoking an endpoint) accordingly. This allows you to modify response headers or bodies, or bypass SvelteKit entirely (for implementing endpoints programmatically, for example).
 
 ```js
 /// file: src/hooks.js