`locked` function should throw per spec

[lucadonnoh]

Code:

curation-protocol/src/CuratorSkeletonNFT.sol

Lines 35 to 39 in 3e34d97

	/*
	* EIP-5192 Functions
	*/
	function locked(uint256) external pure returns (bool) {
	return true;

EIP5192:

/// @notice Returns the locking status of an Soulbound Token
/// @dev SBTs assigned to zero address are considered invalid, and queries
/// about them do throw.
/// @param tokenId The identifier for an SBT.
function locked(uint256 tokenId) external view returns (bool);