Fixing the chefstyle errors and updating ruby 3.1 and chef 18.x in verify pipeline

[nikhil2611]

Description

Updated the verify pipeline to run on ruby 3.1 for all platforms. Updated chef to v18.x Fixed the chefstyle error

Related Issue

https://chefio.atlassian.net/browse/CHEF-1540

Types of changes

• [x] 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)
• [ ] Chore (non-breaking change that does not add functionality or fix an issue)