Vignette for use of ppc*pit_ecdf() with new method argument

.Rbuildignore

@@ -18,3 +18,4 @@ Rplots.pdf
 ^\.github$
 ^release-prep\.R$
 release-prep.R
+^vignettes/articles-online-only$

.github/workflows/pkgdown.yml

@@ -41,6 +41,9 @@ jobs:
             any::withr
             any::BH
             any::RcppEigen
+            any::patchwork
+            any::loo
+            any::rstantools
             stan-dev/pkgdown-config
             local::.
 

_pkgdown.yml

@@ -46,6 +46,12 @@ articles:
       - plotting-mcmc-draws
       - visual-mcmc-diagnostics
       - graphical-ppcs
+  - title: "PIT-ECDF model checking"
+    desc: >
+      Articles on dependence-aware PIT-ECDF checks (website only; not included
+      in the CRAN package).
+    contents:
+      - articles-online-only/loo-pit-correlated-tests
 
 reference:
   - title: "Overview"