Fixed the kableExtra table error

kableExtra requires the `latex_options = "HOLD_position"` in order for this table to show up with a `caption` used. Haven't had time to figure out why.
diff --git a/inst/rmarkdown/templates/posterdown_pdf/skeleton/skeleton.Rmd b/inst/rmarkdown/templates/posterdown_pdf/skeleton/skeleton.Rmd
index 6b65bf8..b035b15 100644
--- a/inst/rmarkdown/templates/posterdown_pdf/skeleton/skeleton.Rmd
+++ b/inst/rmarkdown/templates/posterdown_pdf/skeleton/skeleton.Rmd
@@ -98,7 +98,7 @@
 data("iris")
 
 kable(iris[1:4,],align = "c", caption = "Tables are a breeze with Kable and Kable extra package!", booktabs = TRUE) %>% 
-  kable_styling(latex_options = "striped",full_width = TRUE, font_size = 25)
+  kable_styling(latex_options = c("striped","HOLD_position"),full_width = TRUE, font_size = 25)
 
 ```