Update thesis announcements and add new topics

Removed outdated announcement and added new thesis topics.

Author: noah-13

_pages/thesis.md

@@ -21,7 +21,8 @@ News:
 
 <!-- - 2024, Feb 26: Thank you all for your interest! We are closed for further thesis applications for the upcoming summer semester  -->
 
-- 2026, Jan 15: MSc/BSc project applications deadlines posted. New topics currently under development, stay tuned!
+- 2026, Jan 15: MSc/BSc project applications deadlines posted. ~~New topics currently under development, stay tuned!~~
+- 2026, Jan 19: New thesis topics posted.
 
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