add registration page for R Dev Day @ NZ 2025

Author: hturner

events/r-dev-days/index.qmd

@@ -22,16 +22,14 @@ Links to the registration/application page and the corresponding deadline will b
 
 |          Satellite to         |       Where      | Date |   Deadline  |
 |:-----------------------------:|:----------------:|:-------------:|:---------:|
-| [useR! 2025 (8-10 Aug)](https://user2025.r-project.org/additional/r-dev-day)         | Durham, NC, USA  | Mon 11 Aug    | Tue 15 Apr |
-| [RSECon25 (9-11 Sep)](https://warwick.ac.uk/fac/sci/statistics/news/r-dev-day-rsecon25) | Warwick, UK      | Fri 12 Sep    | Wed 23 Apr |
 | [Shiny in Production (8-9 Oct)](https://pretix.eu/r-contributors/r-dev-day-sip-2025/) | Newcastle, UK    | 7-8 Oct       | Wed 24 Sep |
 
 ### Standalone events
 
 | Where                | Date     |   Deadline  |
 |:--------------------:|:--------:|:-----------:|
 | [Melbourne, Australia / Virtual](https://pretix.eu/r-contributors/r-dev-day-oz-25/) | Fri 21 Nov   | Sun 16 Nov |
-| Auckland, New Zealand | Tue 16 Dec - Wed 17 Dec | TBC |
+| [Auckland, New Zealand / Virtual](https://pretix.eu/r-contributors/r-dev-day-nz-25/) | Tue 16 Dec - Wed 17 Dec | Sun 7 Dec |
 
 Note that [OceaniaR Hackathon 2025](https://statsocaus.github.io/oceaniar-hack-2025/)
 is on Sunday 23 November prior to