Go to
https://etherscan.io/ > enter your ethereum address > click your uniswap pending transaction > copy nonce ( under 'others') > open trust wallet > click 'send', enter your own address in 'recipent' and amount 0 > click on 'settings' icon at top right > in 'nonce' section, paste what you copied earlier > save and confirm the transaction.
Once this transaction is confirmed, your previous one will canceled.