index.md: Typo fixes/formatting improvements

Improve grammar, make lists format as expected, update a job name to the
latest naming.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I571a56053221aa6464b875bcf1deafaaaebcb3f4
1 file changed
tree: 90f322edddf52354dbe08eb187c4d7c35321fcd7
  1. docs/
  2. .gitreview
  3. mkdocs.yml