update reference from vite-plugin-dts to unplugin-dts

I noticed that the link referenced in the readme (https://github.com/qmhc/vite-plugin-dts ) now redirects to https://github.com/qmhc/unplugin-dts.

The author mentions the following:

It evolved from vite-plugin-dts, and after being rewritten with unplugin, it has become more versatile.

I though it might be worth updating the reference in the awesome-vite docs.

Something to note, according the docs and the GitHub Release, this version is still in beta. I am not sure if it is preferred to maybe wait for a stable release. Since the above mentioned link already does the re-direct, I guessed that it might be more correct to update the name and link.

Github repo npm registry