Update DepositContractLib.md

Author: EmpieichO

docs/zkEVM/architecture/high-level/smart-contracts/api/lib/DepositContractLib.md

@@ -29,7 +29,7 @@ Adds a new leaf to a merkle tree.
 
 ### `verifyMerkleProof`
 
-Verify Merkle proof.
+Verifies a Merkle proof.
 
 ```solidity
   function verifyMerkleProof(