Update emu-austral-ornithology.csl

That will be my reference style for the first group in #1253 . Small changes according to the style guide and the sample issue for the journal. In the style guide there is for example the following example (bold format is from me):

Turbott, E. G. <b>(Ed.)</b> (1990). ´Checklist of the Birds of New Zealand and the Ross Dependency, Antarctica.´ (Random Century: Auckland, NZ<b>.)</b>