update outdated import

Author: dario-piotrowicz

packages/cloudflare/templates/defaults/open-next.config.ts

@@ -1,7 +1,6 @@
 // default open-next.config.ts file created by @opennextjs/cloudflare
-import { defineCloudflareConfig } from "@opennextjs/cloudflare/dist/api/config";
-import cache from "@opennextjs/cloudflare/dist/api/kv-cache";
+import { defineCloudflareConfig, kvIncrementalCache } from "@opennextjs/cloudflare";
 
 export default defineCloudflareConfig({
-  incrementalCache: cache,
+  incrementalCache: kvIncrementalCache,
 });