Update FCM message format link in documentation

[jfversluis]

Fixes a broken link

---

Internal previews

📄 File	🔗 Preview link
docs/data-cloud/push-notifications.md	docs/data-cloud/push-notifications

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 issues. Other issues are also a high priority. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.

[learn-build-service-prod]

Learn Build status updates of commit b157a9f:

💡 Validation status: suggestions

File	Status	Preview URL	Details
docs/data-cloud/push-notifications.md	💡Suggestion	View (>=net-maui-8.0)	Details

docs/data-cloud/push-notifications.md

• Line 2033, Column 76: [Suggestion: other-site-link-broken - See documentation] Link 'https://firebase.google.com/docs/cloud-messaging/concept-options' points to a page that doesn't exist. Check the path or URL and update the link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[jfversluis]

The suggestion is for the link I'm replacing somehow. The preview looks good and has the new link. Seems like a false positive.