oas3-server-variables detects ipv6 as invalid url

[mapero]

Describe the bug
When using ipv6 as default value of a server variable. spectral issues an error:
error oas3-server-variables A few substitutions of server variables resulted in invalid URLs: https://%5Bfe80::dcad:beff:fe00:0001%5D/api/v1 servers[1].variables

To Reproduce

1. Given this OpenAPI/AsyncAPI document '...'

servers:
  - url: '/api/v1'
  - url: 'https://{host}/api/v1'
    variables:
      host:
        default: '[fe80::dcad:beff:fe00:0001]'
        description: Hostname or ip address

3. Run this CLI command '....'
   spectral lint api.yaml
4. See error
   error oas3-server-variables A few substitutions of server variables resulted in invalid URLs: https://%5Bfe80::dcad:beff:fe00:0001%5D/api/v1 servers[1].variables

Expected behavior
Accept the ip v6 address as valid variable

Screenshots

Environment (remove any that are not applicable):

• Library version: 6.11.0
• OS: Ubuntu