Addon Docs: Fix reference to global JSX namespace

[mrginglymus]

What I did

Found another reference to the global JSX namespace that no longer exists in React 19+

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

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

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. The particular set of sandboxes can be found in code/lib/cli-storybook/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 Summary

Updates JSX type references in code/addons/docs/src/types.ts to ensure compatibility with React 19+ by replacing global JSX.Element with React.JSX.Element.

• Modified type definitions in code/addons/docs/src/types.ts to use React.JSX.Element instead of global JSX.Element
• Future-proofs the codebase for React 19 where global JSX namespace will be deprecated
• Improves type safety by using the officially recommended JSX type reference pattern

[greptile-apps]

LGTM

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View your CI Pipeline Execution ↗ for commit 8d9cc22.

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☁️ Nx Cloud last updated this comment at 2025-06-05 11:20:54 UTC

[storybook-app-bot]

Package Benchmarks

^{Commit: 8d9cc22, ran on 5 June 2025 at 16:17:48 UTC}

The following packages have significant changes to their size or dependencies:

@storybook/cli

	Before	After	Difference
Dependency count	324	324	0
Self size	244 KB	244 KB	0 B
Dependency size	97.46 MB	97.75 MB	🚨 +295 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/codemod

	Before	After	Difference
Dependency count	267	267	0
Self size	31 KB	31 KB	0 B
Dependency size	81.86 MB	82.16 MB	🚨 +295 KB 🚨
Bundle Size Analyzer	Link	Link