Update adamduda.tex-snippets with detection.packageFamilyName

[Adam Duda (AdamDuda1)]

Extension Submission

Checklist

• My folder follows the <author>/<extension-name> convention (lowercase, alphanumeric + hyphens only)
• I have added an extension.json with all required fields
• The id field in my extension.json matches my folder path (author.extension-name)
• I have added an icon file (PNG or JPG, under 100 KB)
• The icon field in extension.json matches my icon filename
• My extension is available at the install source I specified (winget/MS Store)
• I have read the Contributing Guide

Additional context

Adds detection.packageFamilyName property to detect extension installation through msstore.