README: Fix numbering (after 5. came 1. in Markdown output)
README: Fix numbering (after 5. came 1. in Markdown output)

- Due to the line breaks in 5. it considers 6. to be a new list
  (markdown ignores the numbers themselves)

  Previously 5. and 6. were reversed making it invisible, fixed now.

- Follows-up 2a93c0044beb3278f54759083f6ab0a49e11356c

newzly/testswarm,newzly/testswarm,newzly/testswarm,newzly/testswarm