(CAT-1653) Fix rubocop warnings

[gavindidrichsen]

Summary

Prior to this fix, CI nightly was failing with:

Run bundle exec rubocop --format github

Error: Performance/StringIdentifierArgument: Use `:"disable_#{check}"` instead of `"disable_#{check}"`.
Error: Process completed with exit code 1.

Checklist

• 🟢 Spec tests.
• 🟢 Acceptance tests.
• Manually verified.