Center demo figure2

Change-Id: Ic77495f4d4f7e74d7268ca5385b04bfa7f9378be
diff --git a/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd b/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd
index feb4112..83feeb4 100644
--- a/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd
+++ b/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd
@@ -62,7 +62,7 @@
 plot(mtcars[1:2])
 ```
 
-```{r morefigs, out.width='80%', echo=TRUE, fig.cap='Amazing, right?!', fig.height=5}
+```{r morefigs, out.width='80%', echo=TRUE, fig.align='center', fig.cap='Amazing, right?!', fig.height=5}
 data <- iris
 
 plot(x = data$Sepal.Length,