Change date for next office hours

Author: petewall

README.md

@@ -43,7 +43,7 @@ We hold office hours on the 4th Friday of the month. Meeting times and recording
 
 | Date       | Topic                                         | Link                                          |
 |------------|-----------------------------------------------|-----------------------------------------------|
-| 2025-11-28 | TBD                                           | [Zoom](https://grafana.zoom.us/j/99595566680) |
+| 2025-12-12 | 3.6 Release                                   | [Zoom](https://grafana.zoom.us/j/99595566680) |
 | 2025-10-24 | 3.6 Release preview                           | [Recording](https://youtu.be/z3BNfJLWBj4)     |
 | 2025-09-26 | 3.4 & 3.5 Releases                            | [Recording](https://youtu.be/7V7NKY1NAqE)     |
 | 2025-08-22 | 3.3 Release                                   | [Recording](https://youtu.be/GPverf9LpIo)     |