Use prominent color for "Release notes" link
Use prominent color for "Release notes" link

The color used for the "Release notes" link in home page has poor contrast
with its background making it hard to notice.

So, use a more prominent color for the link.

mosoft521/gitscm-next,mosoft521/gitscm-next,git/git-scm.com,git/git-scm.com,mosoft521/gitscm-next,Mokolea/git-scm.com,Mokolea/git-scm.com,Mokolea/git-scm.com,git/git-scm.com,Mokolea/git-scm.com,mosoft521/gitscm-next,git/git-scm.com