Fix KV API docs link to bulk write (#22049)

Author: WalshyDev

src/content/docs/kv/api/write-key-value-pairs.mdx

@@ -84,7 +84,7 @@ Refer to [How KV works](/kv/concepts/how-kv-works/) for more information on this
 
 ### Write data in bulk
 
-Write more than one key-value pair at a time with Wrangler or [via the REST API](/api/resources/kv/subresources/namespaces/methods/bulk_update/).
+Write more than one key-value pair at a time with Wrangler or [via the REST API](/api/resources/kv/subresources/namespaces/subresources/keys/methods/bulk_update/).
 
 The bulk API can accept up to 10,000 KV pairs at once.