Docs: Update Angular supported version range to include v21

[Copilot]

The Angular framework docs incorrectly listed the supported version range as ≥ 18.0 < 21.0, excluding Angular 21. The actual peer dependencies in code/frameworks/angular/package.json already declare >=18.0.0 < 22.0.0.

Changes

• docs/get-started/frameworks/angular.mdx: Update the Requirements section version range from ≥ 18.0 < 21.0 → ≥ 18.0 < 22.0

Original prompt

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This section details on the original issue you should resolve

<issue_title>Docs: Angular v21 support</issue_title>
<issue_description>

Discussed in #33948

^{Originally posted by OnurhanTALAN February 27, 2026}

Summary

hi, as i've seen storybook support angular versions lower than 21. i would like to learn if support for version 21 is in your roadmap?
Thank you for the assistance.

Additional information

No response

Create a reproduction

No response

</issue_description>

<agent_instructions>Storybook supports Angular 21. The docs are wrong and incomplete.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Docs: Angular v21 support #33954

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Summary by CodeRabbit

• Documentation
  • Updated Angular framework support documentation to reflect extended version compatibility, now supporting Angular versions from 18.0 through 22.0.

[github-actions]

	Fails
🚫	PR description is missing the mandatory "#### Manual testing" section. Please add it so that reviewers know how to manually test your changes.

Generated by 🚫 dangerJS against b061ce9

[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 ad66209 and b061ce9.

📒 Files selected for processing (1)

• docs/get-started/frameworks/angular.mdx

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📝 Walkthrough

Walkthrough

Documentation update to reflect expanded Angular version support in the getting started guide. The Angular version constraint is updated from < 21.0 to < 22.0 to indicate compatibility with Angular 21.

Changes

Cohort / File(s)	Summary
Angular Documentation Version docs/get-started/frameworks/angular.mdx	Updated Angular version constraint from ≥ 18.0 < 21.0 to ≥ 18.0 < 22.0 in the GetStartedVersions block.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~1 minute

Possibly related PRs

• Angular: Enable experimental zoneless detection on Angular v21 #32580: Modifies the same Angular docs file to reflect Angular v21-related version and feature updates.

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[jonniebigodes]

This was an oversight on our end, and we appreciate the quick turnaround on it. I've checked and all is good on my end. Will gladly merge this once the checklist clears.