[addToken] `yETH` to `MAINNET`

[github-actions[bot]]

addToken

Note This is an automated PR

Submitted by @MarcoWorms

Closes #335

---

Adding token yETH on network MAINNET

Address: 0x1bed97cbc3c24a4fb5c069c6e311a967386131f7

Link to block explorer ↗︎

Description	Image
Original
Optimized

Reason

yETH is Yearn staked eth pool, you can confirm this address in yearn docs: https://docs.yearn.fi/getting-started/products/yeth/overview

[alfetopito]

Already in the list