Resolve Layout/LineLength in spec/services/commits/cherry_pick_service_spec.rb

This issue is part of the Source Code Management backend team's effort to resolve RuboCop violations.

Violation

File: spec/services/commits/cherry_pick_service_spec.rb Cop: Layout/LineLength

Steps to resolve

1. Remove the entry from the RuboCop todo file
2. Fix the violation in the code
3. Ensure tests pass
4. Submit the merge request