Reduce height of composition by pub date

Change-Id: I8001bd90a02ffefbe879c154150792b0ceaf8123
diff --git a/R/poster.Rmd b/R/poster.Rmd
index c731019..e24588f 100644
--- a/R/poster.Rmd
+++ b/R/poster.Rmd
@@ -125,7 +125,7 @@
 ### By date of publication
 
 
-```{r composition_by_pubdate, message=F, warning=F, fig.width=14, fig.height=7, out.width = "100%"}
+```{r composition-by-pubdate, message=F, warning=F, fig.width=14, fig.height=3, out.width = "80%"}
 year <- c(1986:2023)
 
 icc_year <- icc %>%