Local development warning for S3 APIs (#21628)

* Local development warning for S3 APIs

* Update src/content/docs/r2/examples/aws/aws-sdk-js-v3.mdx

* Update src/content/docs/r2/examples/aws/aws-sdk-js-v3.mdx

---------

Co-authored-by: Jun Lee <[email protected]>

Author: nchudleigh

src/content/docs/r2/examples/aws/aws-sdk-js-v3.mdx

@@ -8,7 +8,11 @@ import { Render } from "~/components";
 <Render file="keys" />
 <br />
 
-JavaScript or TypeScript users may continue to use the [`@aws-sdk/client-s3`](https://www.npmjs.com/package/@aws-sdk/client-s3) npm package as per normal. You must pass in the R2 configuration credentials when instantiating your `S3` service client:
+JavaScript or TypeScript users may continue to use the [`@aws-sdk/client-s3`](https://www.npmjs.com/package/@aws-sdk/client-s3) npm package as per normal. You must pass in the R2 configuration credentials when instantiating your `S3` service client.
+
+:::note
+Currently, you cannot use AWS S3-compatible API while developing locally via `wrangler dev`.
+:::
 
 :::note[Compatibility]
 Client version `3.729.0` introduced a modification to the default checksum behavior from the client that is currently incompatible with R2 APIs.