Add yUSND to website

### What type of issue is this?

Feature

### What needs to be shipped?

## Issue:

yUSND is not showing on our front-end and it should be.
https://cms-git-eg-yearn.vercel.app/vaults/42161/0x252b965400862d94bda35fecf7ee0f204a53cc36

## Fix:
- [ ] Get vault endorsed
- [ ] Unhide in metadata
- [ ] Set isHighlighted to true
- [ ] Make sure token logos are added to tokenAssets repo