docs(courses): add italian course (#6907)

* docs(courses): add italian course

* docs(courses): removed white-space

Author: LuigiImVector

Diff for: courses/free-courses-it.md

@@ -78,6 +78,7 @@
 ### Database
 
 * [Basi di Dati](https://www.youtube.com/playlist?list=PLAQopGWlIcyZ7CN1sefdnCusfoodLP931) - T. Catarci, Università La Sapienza di Roma
+* [Corso progettazione database](https://www.youtube.com/playlist?list=PL0qAPtx8YtJcJPSV4sOfhLtPbtQ-yycFH) - F. Camuso
 
 
 #### SQL