Ukrainian President Volodomyr Zelensky has changed little since he was 17, except for the fact that he smiles less, Ukraine’s First Lady Olena Zelenska tweeted on Wednesday on the occasion of her husband’s 45th birthday. “I am often asked about how you have changed this year. And I always answer: ‘He hasn’t changed. He is the same. The same guy I have met when we were 17,'” Zelenska tweeted in posts in Ukrainian and English. “But actually, something has changed: you smile much less now,” she added. Posting a photo from more carefree days, Zelenska wished her husband more reasons for smiling. S…