Exclude schema.rb from rubocop lint

[kaysiz]

Purpose

Exclude schema.rb from rubocop lint

closes: Add github issue that originated this PR

Approach

Update .rubocop.yml to exclude schema.rb

Open Questions and Pre-Merge TODOs

Learning

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)

• [ ] New feature (non-breaking change which adds functionality)

• [ ] Breaking change (fix or feature that would cause existing functionality to change)

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[kaysiz]

As far as I can tell, schema.db should be excluded entirely by default: rubocop/rubocop-rails#166

Unfortunately no, https://github.com/datacite/lupo/actions/runs/7898818978/job/21556988597 I have some builds that where failing lint, mybe we need to update our rubocop version :)