add link for R Dev Day at RSECon25

Author: hturner

events/r-dev-days/index.md

@@ -23,7 +23,7 @@ Links to the registration/application page and the corresponding deadline will b
 |:-----------------------------:|:----------------:|:-------------:|:---------:|
 | [Rencontres R 2025 (19-21 May)](https://pretix.eu/r-contributors/r-dev-day-rr2025/) | Mons, Belgium    | Thu 22 May  | Fri 18 Apr |
 | [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)           | Warwick, UK      | Fri 12 Sep    | TBA |
+| [RSECon25 (9-11 Sep)](https://warwick.ac.uk/fac/sci/statistics/news/r-dev-day-rsecon25) | Warwick, UK      | Fri 12 Sep    | Wed 23 Apr |
 | _posit::conf (16-18 Sep)_       | _Atlanta, GA, USA_ | _Fri 19 Sep_    | _TBA_ |
 | [Shiny in Production (8-9 Oct)](https://pretix.eu/r-contributors/r-dev-day-sip-2025/) | Newcastle, UK    | 7-8 Oct       | Wed 24 Sep |