Update Image Denoising docs page about kornia

[johnnv1]

We have a tutorial at: https://kornia.github.io/tutorials/nbs/total_variation_denoising.html -- but thanks for the report, this is some bug with the Image Denoising docs

[johnnv1]

looking into the https://github.com/kornia/kornia/blob/master/docs/source/applications/image_denoising.rst -- the docs should just have a hf space, but it isn't rendering for some reason -- https://huggingface.co/spaces/kornia/total_variation_denoising

[edgarriba]

@johnnv1 I believe there used to be a notebook too