The message translationnotifications-digestemail-body and its translations include angle brackets. The angle brackets were added to make sure that the URL doesn't get mixed with other characters. However, the CI suspects that the angle brackets are HTML and requires a manual review of every translation update that includes the translation of this message.
The URL should be moved to a separate line, which is enough for isolation, and is more readable, too (because URL are often long).
Similar issue: T355306