Update example figure to 16:9

Change-Id: I0a2acf1c403312ebdf637c8366647a979d526750
diff --git a/examples/ids.Rmd b/examples/ids.Rmd
index 0b7762a..81adb21 100644
--- a/examples/ids.Rmd
+++ b/examples/ids.Rmd
@@ -79,7 +79,7 @@
     hc_yAxis(title=list(text="")) %>%
     hc_xAxis(title=list(text="")) %>%
      hc_legend(element_blank()) %>%
-    hc_size(height=500, width=900)
+    hc_size(height=500, width=1260)
   hc
 
 ```