fix: update links to webpack docs

[maiis]

Issue:
Links to webpack documentation for require.context were outdated

What I did

Replaced them with the new links

[codecov]

Codecov Report

Merging #2512 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2512   +/-   ##
=======================================
  Coverage   16.87%   16.87%           
=======================================
  Files         307      307           
  Lines        7792     7792           
  Branches      787      770   -17     
=======================================
  Hits         1315     1315           
+ Misses       5849     5837   -12     
- Partials      628      640   +12

Impacted Files	Coverage Δ
lib/ui/src/modules/ui/configs/init_panels.js	25% <0%> (ø)	⬆️
.../src/manager/containers/CommentsPanel/dataStore.js	34.04% <0%> (ø)	⬆️
...ents/src/manager/containers/CommentsPanel/index.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/search_box.js	23.52% <0%> (ø)	⬆️
addons/a11y/src/components/Tabs.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/libs/filters.js	47.36% <0%> (ø)	⬆️
addons/knobs/src/components/types/Object.js	5.88% <0%> (ø)	⬆️
lib/ui/src/modules/ui/routes.js	0% <0%> (ø)	⬆️
addons/jest/src/hoc/provideJestResult.js	0% <0%> (ø)	⬆️
addons/info/src/components/markdown/text.js	33.33% <0%> (ø)	⬆️
... and 37 more

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[ndelangen]

AWESOME, thanks,

congrats on your first PR on storybook 🎉