chore(deps): update @atlaskit/heading to v7

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@atlaskit/heading (source)	6.2.3 → 7.0.0

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Release Notes

atlassian/atlassian-frontend-mirror (@​atlaskit/heading)

v7.0.0

Major Changes

• 7170acd7feb77 -
  Apply Volt entry-point and multi-export standards via volt-migrate-package. This is a major
  change to @atlaskit/heading: the package exports map has been restructured so every public
  subpath now resolves directly to its ./src/* implementation instead of going through an
  intermediate ./src/entry-points/* re-export. It also introduces new public subpaths:
  @atlaskit/heading/src/heading-context, @atlaskit/heading/use-heading.

Why this is breaking

Because each subpath now points straight at its implementation module, a subpath and the package
root can resolve to the same module instance. Consumers that deep-import the internal
entry-points/* files, or that jest.mock() a specific subpath, may observe changed
resolution/behaviour and need updating.

Migration — public imports are unchanged

Importing the published subpaths (or the package root) continues to work as before:

// Still valid — no change required
import Heading from '@​atlaskit/heading/heading';

If you were reaching into the internal entry-point modules, switch to the public subpath:

-import Heading from '@​atlaskit/heading/entry-points/heading';
+import Heading from '@​atlaskit/heading/heading';

Before / after exports map

  "exports": {
    ".": "./src/index.tsx",
-   "./heading": "./src/entry-points/heading.tsx",
+   "./heading": "./src/heading.tsx",
    "./heading-context": "./src/entry-points/heading-context.tsx",
+   "./src/heading-context": "./src/heading-context.tsx",
+   "./use-heading": "./src/use-heading.tsx",
  }

Patch Changes

• Updated dependencies

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Quality Gate passed

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