Updated release process documentation

[shilman]

Issue: N/A

What I did

Update release process documentation to match what I've been doing in 3.x releases
and so other people can also run releases and also give feedback

How to test

Run the release process by hand if you have permissions to publish

Is this testable with jest or storyshots?

Not currently

Does this need a new example in the kitchen sink apps?

Nope

Does this need an update to the documentation?

This is an update to the documentation 😉

If your answer is yes to any of these, please make sure to include it in your PR.

[codecov]

Codecov Report

Merging #1882 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1882   +/-   ##
=======================================
  Coverage   21.32%   21.32%           
=======================================
  Files         257      257           
  Lines        5739     5739           
  Branches      698      687   -11     
=======================================
  Hits         1224     1224           
- Misses       3970     4000   +30     
+ Partials      545      515   -30

Impacted Files	Coverage Δ
lib/ui/src/modules/ui/configs/init_panels.js	25% <0%> (ø)	⬆️
lib/ui/src/modules/ui/configs/handle_keyevents.js	33.33% <0%> (ø)	⬆️
lib/ui/src/modules/ui/libs/hierarchy.js	48.8% <0%> (ø)	⬆️
app/react-native/src/preview/story_kind.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/shortcuts/actions/shortcuts.js	6.25% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/down_panel.js	23.52% <0%> (ø)	⬆️
addons/info/src/components/Node.js	39.43% <0%> (ø)	⬆️
lib/ui/src/libs/key_events.js	23.25% <0%> (ø)	⬆️
...rc/modules/ui/components/left_panel/text_filter.js	30.98% <0%> (ø)	⬆️
addons/events/src/components/Event.js	0% <0%> (ø)	⬆️
... and 11 more

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[Hypnosphi]

LGTM