Update high risk definition

[srdavidson]

TLS BR definition says

High Risk Certificate Request: A Request that the CA flags for additional scrutiny by reference to internal criteria and databases maintained by the CA, which may include names at higher risk for phishing or other fraudulent usage, names contained in previously rejected certificate requests or revoked Certificates, names listed on the Miller Smiles phishing list or the Google Safe Browsing list, or names that the CA identifies using its own risk-mitigation criteria.

Miller Smiles is no longer updated.

[github-actions]

This issue was created based on:

• TLS BR Version 2.2.8
• EVG Version 2.0.3

[srdavidson]

See #678