rename kvCache to kv-cache (#70)

Author: james-elicx

pages/cloudflare/get-started.mdx

@@ -82,7 +82,7 @@ Add a [`open-next.config.ts`](https://opennext.js.org/aws/config) file to the ro
 
 ```ts
 import type { OpenNextConfig } from "@opennextjs/aws/types/open-next.js";
-import cache from "@opennextjs/cloudflare/kvCache";
+import cache from "@opennextjs/cloudflare/kv-cache";
 
 const config: OpenNextConfig = {
   default: {