improve RELEASE.md

[longwuyuan]

Improve the /RELEASE.md with more details.

[k8s-ci-robot]

@longwuyuan: This issue is currently awaiting triage.

If Ingress contributors determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[longwuyuan]

/assign Thanks, ; Long

…

On Sun, 15 Aug, 2021, 2:23 PM Kubernetes Prow Robot, < ***@***.***> wrote: @longwuyuan <https://github.com/longwuyuan>: This issue is currently awaiting triage. If Ingress contributors determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance. The triage/accepted label can be added by org members by writing /triage accepted in a comment. Instructions for interacting with me using PR comments are available here <https://git.k8s.io/community/contributors/guide/pull-requests.md>. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra <https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:> repository. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#7495 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABGZVWSTLAFTZFYIRATDIMDT456BDANCNFSM5CF6ZVOA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&utm_campaign=notification-email> .

[longwuyuan]

/area docs

[longwuyuan]

closing as merged #7525