[SAM] Add resources
# What does this PR do?

This PR adds links to 2 demo notebooks I made regarding SAM.

It also fixes a hyperlink which didn't render properly in the docs.

cc @younesbelkada 
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_23224). All of your documentation changes will be reflected on that endpoint.