feat: calculate PARENT_NODE_NAMEHASH

Author: 0xAustrian

src/contracts/L2Resolver.sol

@@ -24,7 +24,8 @@ contract L2Resolver is IL2Resolver, IERC165 {
   string public constant CHAIN_IDENTIFIER_EIP7930_KEY = 'chain.id.eip7930';
 
   /// @inheritdoc IL2Resolver
-  bytes32 public constant PARENT_NODE_NAMEHASH = 0xe0266f32655869693dc63423876e5a7367f6e55552b718bdf9c96d0b31f8155d;
+  bytes32 public constant PARENT_NODE_NAMEHASH =
+    keccak256(abi.encodePacked(keccak256(abi.encodePacked(bytes32(0), keccak256('eth'))), keccak256('l2')));
 
   /// @notice The hash of the ".l2.eth" suffix.
   bytes32 internal constant _L2_ETH_SUFFIX_HASH = keccak256(bytes('.l2.eth'));