[BUG] Rubocop Fixes

Created by: rhuanbarreto

Description

Rubocop is giving the following error:

Error: The `Layout/IndentFirstArgument` cop has been renamed to `Layout/FirstArgumentIndentation`.
(obsolete configuration found in clients/ruby/.rubocop.yml, please update it)
The `Layout/TrailingBlankLines` cop has been renamed to `Layout/TrailingEmptyLines`.
(obsolete configuration found in clients/ruby/.rubocop.yml, please update it)
The `Style/UnneededPercentQ` cop has been renamed to `Style/RedundantPercentQ`.
(obsolete configuration found in clients/ruby/.rubocop.yml, please update it)
The `Style/BracesAroundHashParameters` cop has been removed.
(obsolete configuration found in clients/ruby/.rubocop.yml, please update it)
obsolete `EnforcedStyle: rails` (for Layout/IndentationConsistency) found in clients/ruby/.rubocop.yml
`EnforcedStyle: rails` has been renamed to `EnforcedStyle: indented_internal_methods`

openapi-generator version

4.2.3