Increases IA14 axis range

The Lleida plot exited the graph, so this commit increases the IA14 axis
range in order to keep the plot inside the bounding area.

Change-Id: Icc257d3d2f4a24b6f0e246ac26aad5b087f41c08
diff --git a/cron/plot.gnu b/cron/plot.gnu
index 860ec4e..3576b08 100644
--- a/cron/plot.gnu
+++ b/cron/plot.gnu
@@ -2,7 +2,7 @@
 set ylabel "Mitjana taxa de creixement darrers 7 dies"
 set title font "Helvetica,20"
 
-set xrange[0:410]
+set xrange[0:500]
 set yrange[0:5]
 set samples 400