[TypeScript][Skill Sample/Template] Update casing for name property

[Batta32]

Purpose

What is the context of this pull request? Why is it being done?
Running a skill with a different culture to en, the skill doesn't replace the placeholder of {name} due to TypeScript is case sensitive.

Changes

Are there any changes that need to be called out as significant or particularly difficult to grasp? (Include illustrative screenshots for context if applicable.)
For the SampleResponses we updated the casing for the name property:

• {Name} -> {name}

Tests

Is this covered by existing tests or new ones? If no, why not?
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Testing Steps

1. Go to .\templates\Virtual-Assistant-Template\typescript\samples\sample-skill
2. Execute npm install
3. Deploy a Skill in es culture
4. Execute npm run start
5. Run the Sample dialog sending a Test message
6. Send your name once the Skill has answered with ¿Cómo te llamas?
7. Check that the Skill is answering Hola <PLACEHOLDER_REPLACED> replacing the placeholder with the correct one

Feature Plan

Are there any remaining steps or dependencies before this issue can be fully resolved? If so, describe and link to any relevant pull requests or issues.
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Checklist

General

• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the appropriate tests
• I have updated related documentation

Bots

• I have validated that new and updated responses use appropriate Speak and InputHint properties to ensure a high-quality speech-first experience
• I have replicated language model changes across the English, French, Italian, German, Spanish, and Chinese .lu files and validated that deployment is successful

Deployment Scripts

• I have replicated my changes in the Virtual Assistant Template and Sample projects
• I have replicated my changes in the Skill Template and Sample projects