add missing .js extension in import

Author: dario-piotrowicz

packages/cloudflare/src/api/index.ts

@@ -1,5 +1,5 @@
 export * from "./cloudflare-context.js";
 export * from "./config.js";
 export { default as d1TagCache } from "./d1-tag-cache.js";
-export { default as kvIncrementalCache } from "./kv-cache";
+export { default as kvIncrementalCache } from "./kv-cache.js";
 export { default as memoryQueue } from "./memory-queue.js";