[Fix Replicate] Send Prefer:wait header

[Wauplin]

Fixing a bug introduced in #1208 and more precisely here.

For Replicate provider, we must send Prefer: wait header as this is the only path we support for now.

---

Tested locally and it fixes the textToVideo issue we have on https://huggingface.co/Wan-AI/Wan2.1-T2V-14B

import { HfInference } from "@huggingface/inference";
import fs from "fs/promises";

async function generateTextToVideo() {
	const hf = new HfInference("xxx");
	const res = await hf.textToVideo({
		inputs: "a cat swimming in an ocean of bananas",
		provider: "replicate",
		model: "Wan-AI/Wan2.1-T2V-14B",
	});

	const arrayBuffer = await res.arrayBuffer();
	const buffer = Buffer.from(arrayBuffer);
	await fs.writeFile("output.mp4", buffer);
}

generateTextToVideo();

output.mp4

cc @SBrandeis @kefranabg @zeke

[kefranabg]

Nice!

[SBrandeis]

🐐

[Wauplin]

Never got that many approvals so quickly 😄