The `---` evalves to `—`. This patch proposes `----` which produces the
full `----------------------------` across the page.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

Let's create a release_notes directory and an dedicated index file.
Signed-off-by: NAmador Pahim <apahim@redhat.com>

Including the release notes in our docs.
Signed-off-by: NAmador Pahim <apahim@redhat.com>