Docs: Short documentation change from latest to 7 in command

[aminghs]

What I did

I have changed the command since based on the title, we have to upgrade version 6 to 7, not latest.

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

Changes are in md file.

Documentation

• Add or update documentation reflecting your changes
• @[x] 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. The particular set of sandboxes can be found in code/lib/cli/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=<PR_NUMBER>

[greptile-apps]

PR Summary

Updated the MIGRATION.md file to change the Storybook CLI command from 'latest' to '7', ensuring precise version-specific upgrades.

• Modified MIGRATION.md to use storybook@7 instead of storybook@latest for CLI commands.
• Ensures users upgrading from version 6 to 7 use the correct command, avoiding potential issues with future versions.

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[jonniebigodes]

@aminghs thanks for taking the time to put together this pull request and helping us improve the documentation by catching this small item. We appreciate it 🙏 ! I left a small item for you to look into when you have a moment.

Let me know once you've addressed and I'll gladly take another look.

Have a fantastic week.

Stay safe

[nx-cloud]

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[jonniebigodes]

@aminghs, thank you for addressing the feedback so promptly. I appreciate it 🙏 ! All is good on my end. I'm going to merge this once the checklist clears.