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

[siggerzz]

Author Checklist (complete before requesting a review)

• [x] 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: 6df85b28826b801c7be384e421d68678e4013c3b

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