SvelteKit - How to download a file from the assets?

I'm using SvelteKit and I have a file src/assets/my-file.pdf. I'm trying to make a button to download it:

<a download="my-file.pdf" target="_blank" href="assets/my-file.pdf">    Download</a>

But when I click on it, it doesn't work, I get the error File wasn't available on site.

How to download a file from the assets folder?