add blockscout's revoke tool too

Author: austintgriffith

public/content/guides/how-to-revoke-token-access/index.md

@@ -20,6 +20,7 @@ Several websites let you view and revoke smart contracts connected to your addre
 
 - [Ethallowance](https://ethallowance.com/) (Ethereum)
 - [Etherscan](https://etherscan.io/tokenapprovalchecker) (Ethereum)
+- [Blockscout](https://eth.blockscout.com/apps/revokescout) (Ethereum)
 - [Cointool](https://cointool.app/approve/eth) (multiple networks)
 - [Revoke](https://revoke.cash/) (multiple networks)
 - [Unrekt](https://app.unrekt.net/) (multiple networks)