The Pull Request section of the ESLint documentation explicitly mentions that

All ESLint projects follow Conventional Commits for our commit messages¹.

The convention for Conventional Commits is

<type>[optional scope]: <description>

[optional body]

[optional footer(s)]

However, ESLint Bot doesn't recognize the scope part of the commit message, so contributors who are already used to Conventional Commits have to modify the commit message to remove the scope part and recommit.

This caused some trouble. ESLint uses, but not exclusively, Conventional Commits