typo fix in deprecate message

[kebot]

Issue:

What I did

typo fix

How to test

no need to test

[codecov]

Codecov Report

Merging #1366 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #1366   +/-   ##
======================================
  Coverage    14.1%   14.1%           
======================================
  Files         201     201           
  Lines        4609    4609           
  Branches      572     484   -88     
======================================
  Hits          650     650           
- Misses       3467    3550   +83     
+ Partials      492     409   -83

Impacted Files	Coverage Δ
app/react/src/client/index.js	0% <ø> (ø)	⬆️
.../ui/src/modules/ui/components/layout/dimensions.js	15.62% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/left_panel.js	20% <0%> (ø)	⬆️
addons/knobs/src/KnobStore.js	6.81% <0%> (ø)	⬆️
addons/info/src/components/Props.js	0% <0%> (ø)	⬆️
lib/ui/src/libs/key_events.js	23.25% <0%> (ø)	⬆️
addons/knobs/src/components/PropField.js	10.86% <0%> (ø)	⬆️
app/react-native/src/bin/storybook-build.js	0% <0%> (ø)	⬆️
addons/storyshots/src/require_context.js	0% <0%> (ø)	⬆️
app/react/src/server/babel_config.js	44.82% <0%> (ø)	⬆️
... and 19 more

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[usulpro]

issue: #1268 (partially)

[usulpro]

thanks @kebot!
If you want you can fix other issues from #1268