Update AAVE/GHO token logos, add stkGHO

[helpfulBro]

1. Update the AAVE/GHO token logos to align to latest branding.
2. Update GHO token label from Gho to GHO
3. Add staked GHO (stkGHO) token to the contract metadata.

Official website: https://www.aave.com

Project activity:

$19B in Total Value Locked (TVL) across all networks

Etherscan:

stkGHO Contract address: 0x1a88Df1cFe15Af22B3c4c783D4e6F7F9e0C1885d
Reputation: OK
Verified contract: Yes, https://etherscan.io/address/0x1a88Df1cFe15Af22B3c4c783D4e6F7F9e0C1885d#code

This token meets the criteria for inclusion as it has:

A clear use case in the DeFi ecosystem as a wrapped version of ether.fi's liquid staking token
Significant Total Value Locked in the parent protocol, indicating strong adoption
A verified contract on Etherscan
A OK reputation on Etherscan
An active and informative official website

[helpfulBro]

@MRabenda - just realised the token map I provided references stkGHO.svg when the actual filename is STKGHO.svg

Not sure if this will be an issue?