I’d only mention it as a weakness if you followed up with a story of your efforts to overcome and have excelled professionally despite the stutter. Funny side story. Once I was hired at a government agency. The interview had the ‘greatest weakness’ question and I kinda winged it, wasn’t sure what to say. I asked this older lady who was hired at the same time how she answered the question. She replied ohh honey I told them my weakness is that chocolate cake! 😂