Minor update - Convert JSON array to XML examples

[watana2]

Added examples demonstrating how to wrap JSON array in an object before conversion. Included two methods (Compose object and concat approach) to generate valid XML output.

[prmerger-automator]

@watana2 : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit e1115fd:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/logic-apps/expression-functions-reference.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 5e30492:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/logic-apps/expression-functions-reference.md	✅Succeeded

For more details, please refer to the build report.

[Copilot]

Pull Request Overview

This PR adds documentation for converting JSON arrays to XML format in Azure Logic Apps. Since the xml() function doesn't accept raw arrays, the update demonstrates two workarounds for wrapping arrays in objects before conversion.

Key changes:

• Added Example 4 to the xml() function documentation showing array-to-XML conversion techniques
• Documented two approaches: using a Compose action with JSON object wrapper, and using concat() to build the wrapper string

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[v-dirichards]

@ecfan

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[ecfan]

Thanks, @watana2!

[learn-build-service-prod]

Learn Build status updates of commit 3306c90:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/logic-apps/expression-functions-reference.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 6e39628:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/logic-apps/expression-functions-reference.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 6c51b25:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/logic-apps/expression-functions-reference.md	✅Succeeded

For more details, please refer to the build report.

[ecfan]

Thank you!

[learn-build-service-prod]

Learn Build status updates of commit 66e9154:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/logic-apps/expression-functions-reference.md	✅Succeeded

For more details, please refer to the build report.

[ttorble]

@ecfan I'll merge this PR based on your approval. If this article requires further changes, please open a separate pull request.