Add DiffusionFastForward + Fixed Links in README

[mikonvergence]

Description

The course should be added because it is a free open-source course on the topic of denoising diffusion models; consisting of:

• 📺 a video series playlist
• 💻 notebooks (inc. colab) based on a minimal framework written specifically for the course
• 💡 notes

The course goes through multiple use cases of denoising diffusion models, such as unconditional generation, image-to-image translation and generation of high-resolution data - all trained from scratch throughout the course.

Pull request checklist

• [x] Changes added to data.csv. Read contribution guidelines to learn more.
• [x] Changes added to README.md Read contribution guidelines to learn more.
• [x] Pull request description added

[SkalskiP]

Hi, @mikonvergence 👋🏻! Thank you very much for your interest in the project. I'll have to take a peek at the materials you've prepared. I haven't seen this course until now :)

[mikonvergence]

Hi, @SkalskiP! Any progress with verification?