Enable numbered sections in the microcredit walkthrough vignette for improved navigation

Author: bfava

vignettes/articles/microcredit-walkthrough.Rmd

@@ -6,6 +6,7 @@ output:
   rmarkdown::html_vignette:
     toc: true
     toc_depth: 3
+    number_sections: true
 ---
 
 ```{r setup, include = FALSE}