deno TTS aws s3 example is broken

[khcd]

examples/text-to-speech/deno/text-to-speech/text-to-speech-aws.ts

current code results in data loss you can see via the files only sized in bytes

modified code to prevent data loss:

replace:
const content = new Uint8Array(chunks.flat());
with:
`
const totalLength = chunks.reduce((acc, chunk) => acc + chunk.length, 0);
const content = new Uint8Array(totalLength);

let offset = 0;
for (const chunk of chunks) {
content.set(chunk, offset);
offset += chunk.length;
}
`

above code is LLM suggested but I have functionally tested it.

Can submit PR if allowed.