Update 1.0 release note (#2050)
Update 1.0 release note (#2050)

* Chinese: about/contribute/github/index.md

- translate working with GitHub
- translate contributing to docs index

* Chinese: add two indexes for policy and telemetry

- add policy and telemetry index
- add adapters index

* modify translation

* Update 1.0 release note

- delete a English sentence
- update mutual TLS translation

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