fix: adjust syntax for amba-vm team reference

[oZakari]

Overview/Summary

This pull request includes a minor change to the .github/CODEOWNERS file. The change corrects the team assignment for the services/Compute files to ensure the proper team is assigned for ownership.

• .github/CODEOWNERS: Corrected the team assignment from @Azure-amba-vm to @Azure/amba-vm for the services/Compute files.

This PR fixes/adds/changes/removes

1. Fix codeowners file

Breaking Changes

None

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.)

[judyer28]

LGTM