Update storybook monorepo to v9.1.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@storybook/addon-a11y (source)	9.1.13 → 9.1.20
@storybook/addon-docs (source)	9.1.13 → 9.1.20
@storybook/angular (source)	9.1.13 → 9.1.20
storybook (source)	9.1.13 → 9.1.20

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Release Notes

storybookjs/storybook (@​storybook/addon-a11y)

v9.1.20

Compare Source

9.1.20

• Add request validation

v9.1.19

Compare Source

9.1.19

• Harden websocket connection

v9.1.18

Compare Source

9.1.18

• No-op release. No changes.

v9.1.17

Compare Source

• Core: Fix .env-file parsing, thanks @​jreinhold!

v9.1.16

Compare Source

• CLI: Fix Nextjs project creation in empty directories - #​32828, thanks @​yannbf!
• Core: Add experimental_devServer preset - #​32862, thanks @​yannbf!
• Telemetry: Fix preview-first-load event - #​32859, thanks @​shilman!

v9.1.15

Compare Source

• Core: Add preview-first-load telemetry - #​32770, thanks @​shilman!
• Dependencies: Update vite-plugin-storybook-nextjs - #​32821, thanks @​ndelangen!

v9.1.14

Compare Source

• NextJS: Add NextJS 16 support - #​32791, thanks @​yannbf and @​ndelangen!
• Addon-Vitest: Support Vitest 4 - #​32819, thanks @​yannbf and @​ndelangen!
• CSF: Fix play-fn tag for methods - #​32695, thanks @​shilman!

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Latest commit: d512549

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