Website appears safe, but two antivirus vendors flagged it

AVG Antivirus:

Threat name / URL: Blacklist
Threat type: Miscellaneous — potentially malicious software that could harm your data, computer, or network.
URL: https://felixrieseberg.github.io/nightdrive/
Detected by: Web Shield

Fortinet Antivirus:
Marked as phishing
All 90 other vendors marked the website as safe.

The two detections may be false positives, given that the vast majority of vendors found no issues. However, I would recommend looking into these detections further to determine why the site was flagged.