That's a surprising way to frame what the Wikipedia page says. The ban was part of a russification attempt. One of the stated goals, on the page you linked, is "Replace Lithuanian parish schools with Russian grammar schools". Up to that point, Lithuanian had not been written in the Cyrillic alphabet. Polish language was widely used, and its use of Latin alphabet had a huge inspiration on Lithuanian orthography.

To make my point stronger: I would call it a book ban, if English language books were illegal to write in the Latin alphabet, and only allowed in the Cyrillic alphabet. This would be consistent with the situation of Lithuanian language book ban (except it would not replace kindergarten and lower grades with Russian grammar schools).

Calling it a lie seems at the very least ignorant of the actual situation, or worse, willful twisting of history. If the former, I invite you to read https://en.wikipedia.org/wiki/Lithuanian_book_smugglers to find out on which day they are celebrated!