Update link to Azure Naming Tool

[lukemurraynz]

Pull Request Template

What are you trying to address

This pull request includes an update to a link in the docs/design/design-patterns/cloud-resource-design-guidance.md file. The change corrects the URL for the Azure Resource Naming Tool to point to the correct repository.

Documentation update:

• docs/design/design-patterns/cloud-resource-design-guidance.md: Updated the link for the Azure Resource Naming Tool to the correct GitHub repository.

Checklist

READY TO PR? Use the check-list below to ensure your branch is ready for PR.

• [X ] Changes follow the repo structure and land in the appropriate folder and section
• [ X] No confidential information
• [X ] No duplicated content
• [X ] Labeled appropriately
• This PR was reviewed by at least one subject matter expert
• No lint check errors related to your changes

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