chore: update depedabot setting

[climba03003]

Update dependabot setting to reduce unnecessary change and noise.
Ref fastify/fastify#6715

Checklist

• run npm run test && npm run benchmark --if-present
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[Fdawgs]

Have #214 in progress to cut down the already very minimal noise this repo has.

Likewise, chore is the wrong conventional commit type for ci updates, should be ci (or build in the case of this repo as it's all workflows). The scope was also handy.