chore(deps): update storybook monorepo to ^8.6.4

[triple-bot]

This PR contains the following updates:

Package	Type	Update	Change
@storybook/addon-essentials (source)	devDependencies	patch	^8.6.2 -> ^8.6.4
@storybook/addon-links (source)	devDependencies	patch	^8.6.2 -> ^8.6.4
@storybook/addon-onboarding (source)	devDependencies	patch	^8.6.2 -> ^8.6.4
@storybook/blocks (source)	devDependencies	patch	^8.6.2 -> ^8.6.4
@storybook/nextjs (source)	devDependencies	patch	^8.6.2 -> ^8.6.4
@storybook/preview-api (source)	devDependencies	patch	^8.6.2 -> ^8.6.4
@storybook/react (source)	devDependencies	patch	^8.6.2 -> ^8.6.4
storybook (source)	devDependencies	patch	^8.6.2 -> ^8.6.4

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Release Notes

storybookjs/storybook (@​storybook/addon-essentials)

v8.6.4

Compare Source

• Manager: Add Content-Type to fix Cloud IDEs - #​30606, thanks @​GCHQDeveloper548!
• Vite: Include node_modules in stats file - #​30711, thanks @​JReinhold!

storybookjs/storybook (@​storybook/addon-onboarding)

v8.6.4

Compare Source

8.6.4

• Manager: Add Content-Type to fix Cloud IDEs - #​30606, thanks @​GCHQDeveloper548!
• Vite: Include node_modules in stats file - #​30711, thanks @​JReinhold!

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[triple-bot]

Branch automerge failure

This PR was configured for branch automerge. However, this is not possible, so it has been raised as a PR instead.

---

• Branch has one or more failed status checks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 14.02%. Comparing base (d0336f7) to head (f1b92a3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3578   +/-   ##
=======================================
  Coverage   14.02%   14.02%           
=======================================
  Files         749      749           
  Lines       10579    10579           
  Branches     3649     3649           
=======================================
  Hits         1484     1484           
  Misses       8665     8665           
  Partials      430      430           

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