Add Italian Spring Framework video course (#6738)

* Add Italian Spring Framework course

* Update courses/free-courses-it.md

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

courses/free-courses-it.md

@@ -126,6 +126,7 @@
 ### Java
 
 * [Algoritmi e Strutture Dati Java](http://www.vitoantoniobevilacqua.it/wiki/index.php?title=Pagina_principale#Dispense_di_Algoritmi_e_Strutture_Dati_in_Java) - V. Bevilacqua (Politecnico di Bari)  
+* [Corso di Java Spring Framework](https://www.youtube.com/playlist?list=PLCbSCJEIR6CqgCLyVzqp49xOm8A5YDTKA) - Mauro Cicolella
 * [Design Patterns in Java](https://www.youtube.com/playlist?list=PLCbSCJEIR6Cq-ac90TGvJ8Wo8TtyZ4nhu) (M. Cicolella)
 * [Esercitazioni di Spring Boot](https://www.youtube.com/playlist?list=PLCbSCJEIR6CpGchit9OCI6fX_qVYs78d_) (M. Cicolella)
 * [Java EE](https://www.youtube.com/playlist?list=PLjGYWJ4Dcy-erfReHXB9Ush0cREGSmyIe) (S. Zorba)