Uniswap Labs sources token information and token logos from CoinGecko.
To change your token information (i.e. website link, description, etc) and logo on the Uniswap interfaces you will have to change the information on CoinGecko.
After the changes are made on CoinGecko they will reflect on the Uniswap Web app and Mobile Wallet after 48 hours.
You can submit a request to update token logos or information via the CoinGecko Help Center: CoinGecko Support Form