Update dependency jest-extended to v7 (TryGhost#27309)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
|
[jest-extended](https://redirect.github.com/jest-community/jest-extended)
| [`6.0.0` →
`7.0.0`](https://renovatebot.com/diffs/npm/jest-extended/6.0.0/7.0.0) |
![age](https://developer.mend.io/api/mc/badges/age/npm/jest-extended/7.0.0?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/jest-extended/6.0.0/7.0.0?slim=true)
|

---

### Release Notes

<details>
<summary>jest-community/jest-extended (jest-extended)</summary>

###
[`v7.0.0`](https://redirect.github.com/jest-community/jest-extended/blob/HEAD/CHANGELOG.md#700)

[Compare
Source](https://redirect.github.com/jest-community/jest-extended/compare/v6.0.0...v7.0.0)

##### Major Changes

-
[`50a96f9`](https://redirect.github.com/jest-community/jest-extended/commit/50a96f9):
Drop support for Node 18 and 23 and add support for Node 24 and 25

</details>

---

### Configuration

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🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
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---

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apps/admin/package.json

@@ -41,7 +41,7 @@
     "eslint-plugin-react-refresh": "0.4.24",
     "eslint-plugin-tailwindcss": "4.0.0-beta.0",
     "globals": "17.4.0",
-    "jest-extended": "6.0.0",
+    "jest-extended": "7.0.0",
     "jsdom": "28.1.0",
     "msw": "2.12.14",
     "sirv": "3.0.2",