Update regex for Organization in Azure Devops detector

[abmussani]

Description:

As per AzureDevOps documentation about Organization renaming, The old regex is not accommodating hyphens and length conditions. This PR allows to detect correct naming of organization.

Here are some key-points from documentation about organization renaming:

  Adhere to the following guidelines when you create an organization name.

  - Use only letters from the English alphabet
  - Start your organization name with a letter or number
  - Use letters, numbers, or hyphens after the initial character
  - Ensure that your organization doesn't exceed 50 Unicode characters
  - End with a letter or number

  If you use any of the disallowed characters, you get the following error message: VS850015: The specified name is not allowed to be used: {Organization name}.

Checklist:

• Tests passing (make test-community)?
• Lint passing (make lint this requires golangci-lint)?

[zricethezav]

Very nice. Thanks for linking to the documentation that outlines this credential's requirements!