tweaks to release notes (#3697)
tweaks to release notes (#3697)

* tweaks to release notes

* Update index.md

* Update index.md

* Update index.md

istio/istio.io,geeknoid/istio.github.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,geeknoid/istio.github.io,geeknoid/istio.github.io,geeknoid/istio.github.io,istio/istio.io,geeknoid/istio.github.io