docs: add zk token address (#411)

Author: sarahschwartz

content/00.zksync-era/20.environment/10.l1-contracts.md

@@ -16,6 +16,16 @@ The information about L1 smart contracts can be found in the [protocol documenta
 - **MailboxFacet:** [0x63b5EC36B09384fFA7106A80Ec7cfdFCa521fD08](https://etherscan.io/address/0x63b5EC36B09384fFA7106A80Ec7cfdFCa521fD08#code)
 - **ValidatorTimelock:** [0xa8cb082a5a689e0d594d7da1e2d72a3d63adc1bd](https://etherscan.io/address/0xa8cb082a5a689e0d594d7da1e2d72a3d63adc1bd#code)
 - **AllowList:** [0x0C0dC1171258694635AA50cec5845aC1031cA6d7](https://etherscan.io/address/0x0C0dC1171258694635AA50cec5845aC1031cA6d7#code)
+- **ZK Token:** [0x66A5cFB2e9c529f14FE6364Ad1075dF3a649C0A5](https://etherscan.io/token/0x66A5cFB2e9c529f14FE6364Ad1075dF3a649C0A5#code)
+
+::callout{icon="i-heroicons-exclamation-triangle" color="amber"}
+Disclaimer:
+The ZK token contract address is provided for informational purposes only.
+Users should verify this address independently before interacting with it.
+Matter Labs makes no guarantees regarding the token's functionality, security, or value.
+This information is not investment advice.
+Users interact with the contract at their own risk.
+::
 
 ## L1 Testnet Contract Addresses
 
@@ -28,3 +38,4 @@ The information about L1 smart contracts can be found in the [protocol documenta
 - **MailboxFacet:** [0x2ed8eF54a16bBF721a318bd5a5C0F39Be70eaa65](https://sepolia.etherscan.io/address/0x2ed8eF54a16bBF721a318bd5a5C0F39Be70eaa65#code)
 - **ValidatorTimelock:** [0x8CaC0a609A314E4161b8070cdEe065060B2486A1](https://sepolia.etherscan.io/address/0x8CaC0a609A314E4161b8070cdEe065060B2486A1#code)
 - **AllowList:** [0x7546a21cd4D74fc98Ef1A50145dfd8c043e2096F](https://sepolia.etherscan.io/address/0x7546a21cd4D74fc98Ef1A50145dfd8c043e2096F#code)
+- **ZK Token:** [0x2569600e58850a0aad61f7dd2569516c3d909521](https://sepolia.etherscan.io/address/0x2569600e58850a0aad61f7dd2569516c3d909521#code)