The operation (_currentValueInProtocol * _ezETHBeingBurned) / _existingEzETHSupply can lead to a division by zero if _existingEzETHSupply is zero. 
https://github.com/code-423n4/2024-04-renzo/blob/519e518f2d8dec9acf6482b84a181e403070d22d/contracts/Oracle/RenzoOracle.sol#L152-L164
