⬆️ Upgrade storybook to 8.6.3

[sergei-maertens]

Monthly storybook upgrade :)

[codecov]

Bundle Report

Changes will increase total bundle size by 14 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
@open-formulieren/sdk-OpenForms-umd	4.78MB	7 bytes (0.0%) ⬆️
@open-formulieren/sdk-esm	4.75MB	7 bytes (0.0%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: @open-formulieren/sdk-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/sdk-*.js	7 bytes	1.01MB	0.0%

Files in assets/sdk-*.js:

• ./src/components/LanguageSelection/LanguageSelection.jsx → Total Size: 2.42kB

view changes for bundle: @open-formulieren/sdk-OpenForms-umd

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
open-*.js	7 bytes	3.49MB	0.0%

Files in open-*.js:

• ./src/components/LanguageSelection/LanguageSelection.jsx → Total Size: 2.42kB

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.99%. Comparing base (adf8ff7) to head (b3d8770).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #799   +/-   ##
=======================================
  Coverage   83.99%   83.99%           
=======================================
  Files         246      246           
  Lines        4817     4818    +1     
  Branches     1275     1282    +7     
=======================================
+ Hits         4046     4047    +1     
  Misses        742      742           
  Partials       29       29           

Flag	Coverage Δ
storybook	77.68% <100.00%> (+0.09%)	⬆️
vitest	62.56% <0.00%> (-0.07%)	⬇️

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