w2025: some more schedule + program info

Author: mezzarobba

workshop2025.md

@@ -8,6 +8,8 @@
   * Mon, Jan 27: Gilles Kahn room (ground floor)
   * Tue, Jan 28 – Fri, Jan 31: Grace Hopper room (2nd floor, at the very back of
   the building)
+* We will start around 09:00 on Monday and end around 17:00 on Friday, but feel
+  free to arrive later or leave earlier.
 
 ## Program
 
@@ -21,6 +23,9 @@ and technical talks.
 Feel free to reach out to the organizers with presentation proposals or
 suggestions for topics you'd like to see covered.
 
+Additional informal talks and public discussions will be scheduled as the need
+arises.
+
 ## Discussion
 
 * Zulip chat: [https://sagemath.zulipchat.com/#narrow/stream/408539-flint](https://sagemath.zulipchat.com/#narrow/stream/408539-flint)