Add release instructions (#158)
Add release instructions (#158)

* Add instructions on how to prepare a new release

* forgot to remove old instructions when re-arranging

* include versioning notes, we follow semver

* add changelog convention and manual check step

* update releases.md based on conversations/reviews

* update changelog/release-notes section to reflect current realities

* reformat to account for mkdocs sublist handling

* updates based on personal experience

* expanding the last step into two

* (WIP) account for checklists

* cleanup and wording based on talks with @m8ttyB and @sandysage

* added line to releases.md about user stories/epics

* tweask to  section

* fix a typo

mozilla-lockbox/lockbox-extension,mozilla-lockbox/lockbox-extension,mozilla-lockbox/lockbox-extension