Auto merge of #6148 - flip1995:release_doc, r=ebroto
Auto merge of #6148 - flip1995:release_doc, r=ebroto

Update release documentation

When updating the beta branch, we want to reset, instead of rebase. Otherwise we might produce again new commits on the beta branch, that aren't on the master branch.

changelog: none

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust