Adding na-notebook vignette to pkgdown articles

Author: rnayebi21

_pkgdown.yml

@@ -32,6 +32,7 @@ articles:
       - outliers
       - growth_rate
       - correlation
+      - na-notebook
 
   - title: Developer
     contents:

vignettes/na-notebook.Rmd

@@ -1,8 +1,9 @@
 ---
-title: "Handling Missing Data in Epi Signals"
-author: "Ryan Nayebi"
-date: "`r Sys.Date()`"
-output: rmarkdown::html_vignette
+title: "na-notebook"
+output:
+  pdf_document: default
+  html_document: default
+date: "2024-08-19"
 ---
 
 ```{r setup, warning=FALSE, echo=FALSE}