Update docs/zkEVM/architecture/effective-gas/index.md

Co-authored-by: hsutaiyu <51791408+hsutaiyu@users.noreply.github.com>

Author: EmpieichO

docs/zkEVM/architecture/effective-gas/index.md

@@ -9,7 +9,7 @@ Now that the EGP is in place, you can reduce any chance for a transaction revert
 In Ethereum, gas fees for a transaction are decided using two adjustable parameters:
 
 - The $\texttt{gasLimit}$, which is the maximum amount of gas units the user is willing to buy in order for their transactions to be included in a block and processed on chain.
-- The $\texttt{gasPrice}$, that is, the amount of wei a user is willing to pay for 1 gas unit.
+- The $\texttt{gasPrice}$, that is, the amount of ETH a user is willing to pay for 1 gas unit. For instance, a gas price of 10 Gwei means the user is willing to pay 0.00000001 ETH for each unit of gas.
 
 At the beginning of each transaction, the amount of wei sufficient to cover transaction costs is deducted from the user's account balance.