fix: skip fetch caching if some server node was invalidated (fixes #6357)

Author: Tal500

.changeset/hip-forks-hunt.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+Skip `fetch` caching if some server node was invalidated (fixes #6357)

packages/kit/src/runtime/client/client.js

@@ -720,7 +720,8 @@ export function create_client({ target, base, trailing_slash }) {
 					{
 						headers: {
 							'x-sveltekit-invalidated': invalid_server_nodes.map((x) => (x ? '1' : '')).join(',')
-						}
+						},
+						cache: 'no-cache'
 					}
 				);