Update seminar.md

seminar.md

@@ -50,6 +50,7 @@ and a mattermost channel for chat. To join the mattermost channel:
 
 |Date|Speaker|Title/Topic|
 |----|-------|-----------|
+|?| Dennis Müller/Michael Kohlhase | sTeX 3 – Semantic LaTeX Reimagined |
 |2022-01-10| Abdou Youssef | Machine Learning for Math: Vision and Intermediate Milestones |