charged-ieee: incorrect 3rd level heading format

[weirane]

The current 3rd level heading uses a), but it should be italicized 1).

#import "@preview/charged-ieee:0.1.4": ieee
#show: ieee.with(
  title: [Title],
  abstract: [ Abstract ],
)

= Heading 1
== Heading 2
=== Heading 3

Correct example: https://mirror.math.princeton.edu/pub/CTAN/macros/latex/contrib/IEEEtran/IEEEtran_HOWTO.pdf