fix: switch tokenizer in cloudflare

.changeset/loud-gifts-wink.md

@@ -0,0 +1,5 @@
+---
+"@llamaindex/env": patch
+---
+
+fix: switch tokenizer in cloudflare

packages/env/src/tokenizers.workerd.ts

@@ -2,4 +2,4 @@ export {
   Tokenizers,
   tokenizers,
   type Tokenizer,
-} from "./internal/tokenizers/js.js";
+} from "./internal/tokenizers/node.js";