Docs: Use storybook build command in main config build docs

[pavan-sh]

Closes #

What I did

• Updated the main-config-build documentation to reference the current CLI command storybook build (instead of the legacy build-storybook) when describing how to enable the --test flag behavior.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

Caution

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Manual test (docs-only):

1. Open docs/api/main-config/main-config-build.mdx
2. Confirm the paragraph under the test section now says running storybook build enables the feature via the --test flag.
3. Ensure the surrounding callout already referencing storybook build is consistent with the updated sentence.

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes.
• documentation

🦋 Canary release

This PR does not have a canary release associated.

Summary by CodeRabbit

• Documentation
  • Updated build configuration documentation to display the correct command reference for enabling the test feature. This ensures users have accurate information for their builds.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 7284b33 and 95aaa14.

📒 Files selected for processing (1)

• docs/api/main-config/main-config-build.mdx

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📝 Walkthrough

Walkthrough

Documentation update correcting the command reference in the build configuration section from the deprecated build-storybook to storybook build command.

Changes

Cohort / File(s)	Summary
Documentation Update docs/api/main-config/main-config-build.mdx	Updated command reference from build-storybook to storybook build in narrative text describing test flag activation.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• Docs: Fix build command and typo in main config build #33816: Modifies the same documentation file to replace the deprecated build-storybook command with storybook build.

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