chore(renovate): update renovate config

[schultzp2020]

Description

Please explain the changes you made here.

Which issue(s) does this PR fix

Renovate will require dashboard approval before creating PRs related to the core Backstage packages.

• Fixes Pin dependency versions using renovate #385

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

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Latest commit: 85490de

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[sonarcloud]

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