Incorrect Transceiver payload prefix definition
The `WH_TRANSCEIVER_PAYLOAD_PREFIX` constant in `WormholeTransceiverState.sol` contains invalid ASCII bytes and, as such, does not match what is written in the inline developer documentation:\\n```\\n/// @dev Prefix for all TransceiverMessage payloads\\n///      This is 0x99'E''W''H'\\n/// @notice Magic string (constant value set by messaging provider) that idenfies the payload as an transceiver-emitted payload.\\n///         Note that this is not a security critical field. It's meant to be used by messaging providers to identify which messages are Transceiver-related.\\nbytes4 constant WH_TRANSCEIVER_PAYLOAD_PREFIX = 0x9945FF10;\\n```\\n\\nThe correct payload prefix is `0x99455748`, which is output when running the following command:\\n```\\ncast --from-utf8 "EWH"\\n```\\n
Update the constant definition to use the correct prefix corresponding to the documented string:\\n```\\n// Add the line below\\n bytes4 constant WH_TRANSCEIVER_PAYLOAD_PREFIX = 0x99455748;\\n```\\n
While still a valid 4-byte hex prefix, used purely for identification purposes, an incorrect prefix could cause downstream confusion and result in otherwise valid Transceiver payloads being incorrectly prefixed.
```\\n/// @dev Prefix for all TransceiverMessage payloads\\n///      This is 0x99'E''W''H'\\n/// @notice Magic string (constant value set by messaging provider) that idenfies the payload as an transceiver-emitted payload.\\n///         Note that this is not a security critical field. It's meant to be used by messaging providers to identify which messages are Transceiver-related.\\nbytes4 constant WH_TRANSCEIVER_PAYLOAD_PREFIX = 0x9945FF10;\\n```\\n