fix(pie-monorepo): DSW-000 Fix dependabot config.

[siggerzz]

Author Checklist (complete before requesting a review)

• I have performed a self-review of my code

Fixes an issue where the renovate config didn't align with the schema. As part of this PR I have:

• Fixed the underlying issues with the config.
• Added YAML schema validation
• Included redhat.vscode-yaml as a VS Code recommended extension

Note

Dependabot check is still failing in this PR, as GitHub Actions is reading the config from main

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Latest commit: 6df85b2

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