Change README to match package.json script

[mccullochk]

Changed the README in /docs to match the script defined in the package.json.

[codecov]

Codecov Report

Merging #2202 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2202   +/-   ##
=======================================
  Coverage   21.42%   21.42%           
=======================================
  Files         263      263           
  Lines        5807     5807           
  Branches      688      696    +8     
=======================================
  Hits         1244     1244           
+ Misses       4042     4036    -6     
- Partials      521      527    +6

Impacted Files	Coverage Δ
app/vue/src/server/utils.js	0% <0%> (-53.58%)	⬇️
addons/knobs/src/KnobManager.js	32% <0%> (ø)	⬆️
addons/info/src/components/Props.js	36.36% <0%> (ø)	⬆️
...ponents/left_panel/stories_tree/tree_decorators.js	33.33% <0%> (ø)	⬆️
lib/ui/src/modules/ui/routes.js	0% <0%> (ø)	⬆️
addons/info/src/components/Node.js	39.7% <0%> (ø)	⬆️
app/react-native/src/preview/story_kind.js	0% <0%> (ø)	⬆️
addons/knobs/src/components/types/Color.js	8.1% <0%> (ø)	⬆️
...codemod/src/transforms/update-organisation-name.js	40.62% <0%> (ø)	⬆️
addons/storyshots/src/storybook-channel-mock.js	0% <0%> (ø)	⬆️
... and 17 more

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[Hypnosphi]

Nice catch, thanks!