need xml2 for timings

Nicholas Clark · Nicholas Clark · commit cf013d2d0885 · 2024-05-02T07:42:15.000+10:00
diff --git a/.github/workflows/R-CMD-check-rstan.yaml b/.github/workflows/R-CMD-check-rstan.yaml
@@ -63,6 +63,7 @@ jobs:
               rjags
               coda
               testthat
+              xml2
               usethis
               rcmdcheck
 
