Update vignettes/using-association-plot.Rmd

Co-authored-by: kartikeya kirar <[email protected]>
Signed-off-by: Marcin <[email protected]>

vignettes/using-association-plot.Rmd

@@ -53,7 +53,7 @@ ADLB <- teal.modules.general::rADLB %>%
 # nolint end
 ```
 
-## Create an `app` variable
+## Initialize an app
 
 This is the most important section. We will use the [`teal::init`](https://insightsengineering.github.io/teal/latest-tag/reference/init) function to
 create an app. The data will be handed over using [`teal.data::cdisc_data`](https://insightsengineering.github.io/teal.data/latest-tag/reference/cdisc_data). The app