Update citation in index.qmd

Author: NicoleMGreco

materials/index.qmd

@@ -84,7 +84,7 @@ These written materials are the result of a continuous and collaborative effort
 
 This work is licensed under a [Creative Commons Attribution 4.0 International License](http://creativecommons.org/licenses/by/4.0/).
 
-**Citation:** Matthew B. Jones, S. Jeanette Clark, Nicole Greco, Maggie Klope, Jim Regetz (2025), Reproducible Practices for Arctic Research Using R. Arctic Data Center & NCEAS Learning Hub. doi:10.18739/A2057CV1S. URL <https://learning.nceas.ucsb.edu/2025-02-arctic>.
+**Citation:** Matthew B. Jones, S. Jeanette Clark, Nicole Greco, Maggie Klope, Jim Regetz (2026), Reproducible Practices for Arctic Research Using R. Arctic Data Center & NCEAS Learning Hub. doi:10.18739/A25T3G24R. URL <https://learning.nceas.ucsb.edu/2026-03-arctic>.
 
 **Additional contributors:** Ben Bolker, Amber E. Budden, Julien Brun, Samantha Csik, Halina Do-Linh, Natasha Haycock-Chavez, S. Jeanette Clark, Julie Lowndes, Stephanie Hampton, Samanta Katz, Erin McLean, Bryce Mecum, Casey O'Hara, Deanna Pennington, Karthik Ram, Jim Regetz, Tracy Teal, Camila Vargas-Poulsen, Daphne Virlar-Knight, Leah Wasser.