Rename parameter for `decodeData` from `keyName` -> `keyNameOrHex`

[CJ42]

Summary

The function decodeData can take the first parameter in the array entry in two forms:

• either the key name as a plain word string like LSP3Profile (the name field in an ERC725Y JSON Schema`.
• or the bytes32 hex string of the key (the key field in an ERC725Y JSON Schema).

However the generated docs + param name is only called keyName. This can be confusing for developers when hovering over the function in their IDE and seeing the parameter name and description (intellisense)

See the docs page for infos: