docs: make the gtk/gdk regex catch gsk/pango as well
docs: make the gtk/gdk regex catch gsk/pango as well

it's very common to have GskX or PangoX
with this change both will be replaced with their equivalent rust type

GuillaumeGomez/gir,gtk-rs/gir,GuillaumeGomez/gir,GuillaumeGomez/gir,gtk-rs/gir,gtk-rs/gir