Replace decorate with decorateAction

[fvilers]

Issue: decorate is undefined

What I did

Rename decorate with decorateAction.

How to test

No tests, only documentation update.

For maintainers only: Please tag your pull request with at least one of the following:
["cleanup", "BREAKING CHANGE", "feature request", "bug", "documentation", "maintenance", "dependencies", "other"]

[codecov]

Codecov Report

Merging #3538 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3538   +/-   ##
=======================================
  Coverage   37.37%   37.37%           
=======================================
  Files         492      492           
  Lines       10774    10774           
  Branches      948      983   +35     
=======================================
  Hits         4027     4027           
+ Misses       6173     6136   -37     
- Partials      574      611   +37

Impacted Files	Coverage Δ
lib/ui/src/modules/ui/containers/shortcuts_help.js	25% <0%> (ø)	⬆️
addons/a11y/src/components/Report/Info.js	0% <0%> (ø)	⬆️
addons/a11y/src/components/Report/Tags.js	0% <0%> (ø)	⬆️
addons/a11y/src/components/Report/Item.js	0% <0%> (ø)	⬆️
...ddons/actions/src/components/ActionLogger/index.js	0% <0%> (ø)	⬆️
lib/core/src/client/preview/reducer.js	37.5% <0%> (ø)	⬆️
lib/ui/src/modules/ui/routes.js	0% <0%> (ø)	⬆️
...codemod/src/transforms/update-organisation-name.js	40.62% <0%> (ø)	⬆️
lib/core/src/client/preview/subscriptions_store.js	68.96% <0%> (ø)	⬆️
lib/ui/src/modules/shortcuts/index.js	18.18% <0%> (ø)	⬆️
... and 60 more

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