docs: refresh README as ether.fi's Liquid Staking Protocol Contracts - #502

Bugbot Analysis Progress (36s elapsed)

✅ Gathered PR context (5s)
✅ Completed bug detection (31s)
✅ Posted analysis results (0s)

Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_fb34aba8-ec8f-4139-8434-09fecb5fe568