fix: avm child module publishing skill naming

[eriqua]

Overview/Summary

Ref https://docs.github.com/en/copilot/how-tos/use-copilot-agents/coding-agent/create-skills

The above documentation mentions that the skill name must be lowercase, using hyphens for spaces. Also for me the current name shows a warning in vs code which suggests the name to be exactly like the name of the skill folder (which also must be lowercase).

This PR fixes/adds/changes/removes

1. Replace me
2. Replace me
3. Replace me

Breaking Changes

1. Replace me
2. Replace me

As part of this Pull Request I have

• Read the Contribution Guide and ensured this PR is compliant with the guide
• Checked for duplicate Pull Requests
• Associated it with relevant GitHub Issues or ADO Work Items (Internal Only)
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Ensured PR tests are passing
• Updated relevant and associated documentation (e.g. Contribution Guide, Docs etc.)

[microsoft-github-policy-service]

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