Add Il Post dataset description

introduction.md

@@ -62,6 +62,8 @@ this dataset and these have been collected from the web. We downloaded the image
 could not retrieve them all. Eventually, we had to translate the captions to Italian. We have been able to collect
 a dataset with 700K translated captions.
 
++ [La Foto del Giorno](https://www.ilpost.it/foto-del-giorno/). This image-caption dataset is collected from [Il Post](https://www.ilpost.it/), a prominent Italian online newspaper. The collection contains almost 30K pairs: starting from early 2011, for each day, editors at Il Post pick several images picturing the most salient events in the world. Each photo comes along with an Italian caption.
+
 
 ## Better Augmentations