Spectal complains when a openapi pattern uses a Unicode character set #2419

Describe the bug

spectral incorrectly flags an example corresponding to a valid regexp pattern as invalid.

JSON Schema says that patterns should be processed as Unicode regexp, but it appears that the fix #1787 for #1782 turned off unicodeRegExp :

unicodeRegExp: false,

Thus for the following property

openapi: 3.1.0
components:
  schemas:
    label:
      description: The human readable label for the report type.
      type: string
      minLength: 1
      maxLength: 55
      pattern: '^\P{Cc}{1,55}$'
      example:
        Admin User Activity

We get

 11:9    error  oas3-valid-schema-example  "example" property must match pattern "\P{Cc}{1,55}"      components.schemas.label.example

even though this is a valid example that matches the regex

> 'Admin User Activity'.match(/^\P{Cc}{1,55}$/u)
'Admin User Activity'.match(/^\P{Cc}{1,55}$/u)
[
  'Admin User Activity',
  index: 0,
  input: 'Admin User Activity',
  groups: undefined
]
> 

To Reproduce

1. Save the sample as openapi.yaml
2. Run this CLI command

echo 'extends: spectral:oas' > .spectral.yaml
spectral lint openapi.yaml

5. See error

 11:9    error  oas3-valid-schema-example  "example" property must match pattern "\P{Cc}{1,55}"      components.schemas.label.example

Expected behavior

no false negative error for a valid pattern that matches a pattern with a charset pattern

Since a bug fix intentionally disables Unicode, and enabling it may break others, I would like an option to enable it,
either in the CLI options or in the spectral ruleset.

Environment (remove any that are not applicable):

• Library version: spectral cli 6.4.2
• OS: MacOS 13.2.1
• Browser: n/a