update README

Author: Ernest Guevarra

README.Rmd

@@ -378,7 +378,7 @@ for all children in the cohort or sample for all the anthropometric indices.
 
 To use the included Shiny app, run the following command in R:
 
-```{r, echo = FALSE, eval = FALSE}
+```{r, echo = TRUE, eval = FALSE}
 run_zscorer()
 ```
 

README.md

@@ -510,6 +510,10 @@ the anthropometric indices.
 
 To use the included Shiny app, run the following command in R:
 
+``` r
+run_zscorer()
+```
+
 This will initiate the Shiny app using the installed web browser in your
 current device as shown below: