docs(release): Add release notes for 8.6.1

docs(release): Add release notes for 8.6.0

docs(release): Add release notes for 8.5.0

docs(release): Add release notes for 8.4.0

docs(release): Add release notes for 8.3.1

docs(release): Add release notes for 8.3.0

docs(release): Add release notes for 8.2.1

docs(release): Add release notes for 8.2.0

docs(release): Add release notes for 8.1.0

docs(release): Add release notes for 8.1.0