fix: use correct vars

[mattsse]

Hit footgun with param order...

/// Decodes the `eip1559` parameters from the `extradata` bytes.
///
/// Returns (`elasticity`, `denominator`)
pub fn decode_holocene_extra_data(extra_data: &[u8]) -> Result<(u32, u32), EIP1559ParamError> {

[Rjected]

RIP, should we have made this method return a base fee param struct?

[mattsse]

yeah, or ideally the order in which these params are encoded, which is the other way around.

very bad -.-