Improve serifs of two extended Cyrillic letters under italics.

[jmcwilliams403]

Mainly focusing on lower ᲄ and ꙓ under slab italic.

ГТᲉᲄЪᲆъᲅꭠꙒѢꙓᲇѣᲊ
Slab Upright Before:

Slab Upright After:

Slab Italic Before:

Slab Italic After:

SS02 Slab Upright Before:

SS02 Slab Upright After:

SS02 Slab Italic Before:

SS02 Slab Italic After:

Etoile Upright Before:

Etoile Upright After:

Etoile Italic Before:

Etoile Italic After:

SS02 Etoile Upright Before:

SS02 Etoile Upright After:

SS02 Etoile Italic Before:

SS02 Etoile Italic After: