Update gatsby in /docs from 1.9.236 to 1.9.238

[dependencies]

Dependencies.io has updated gatsby (a npm dependency in /docs) from "1.9.236" to "1.9.238".

1.9.238

No content found. Please open an issue at https://github.com/dependencies-io/support if you think this content could have been found.

[codecov]

Codecov Report

Merging #3249 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #3249   +/-   ##
======================================
  Coverage    35.9%   35.9%           
======================================
  Files         440     440           
  Lines        9669    9669           
  Branches      904     918   +14     
======================================
  Hits         3472    3472           
+ Misses       5609    5601    -8     
- Partials      588     596    +8

Impacted Files	Coverage Δ
app/react/src/server/utils.js	0% <0%> (-100%)	⬇️
.../ui/src/modules/ui/components/layout/dimensions.js	15.62% <0%> (ø)	⬆️
addons/knobs/src/components/PropField.js	10.63% <0%> (ø)	⬆️
...i/src/modules/ui/components/stories_panel/index.js	21.66% <0%> (ø)	⬆️
app/react/src/demo/Welcome.js	63.15% <0%> (ø)	⬆️
lib/ui/src/modules/ui/components/search_box.js	36.36% <0%> (ø)	⬆️
lib/ui/src/modules/api/index.js	0% <0%> (ø)	⬆️
addons/jest/src/components/Indicator.js	0% <0%> (ø)	⬆️
addons/jest/src/components/Result.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/shortcuts_help.js	25% <0%> (ø)	⬆️
... and 67 more

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