plotlyupdate.m references old **MATLAB-api** repo name

plotlyupdate.m is currently failing with the following error message:

************************************************
[UPDATING] Plotly v.2.2.6 ----> Plotly v.2.2.7 
************************************************


An error occured while updating to the newest version 
of Plotly v.2.2.7. Please check your write permissions
for your outdated Plotly directories with your system admin.
Contact chuck@plot.ly for more information.


***************************************************
[UPDATE UNSUCCESSFUL] visit: https://plot.ly/matlab 
or contact: chuck@plot.ly for further information. 
***************************************************

The actual issue is that the update script is referencing the old MATLAB-api repo name and failing to locate the necessary files throughout the update.

fyi @cldougl

Inizia da plotlyupdate.m e traccia il nome del repository utilizzato durante la ricerca dei file di aggiornamento. Sostituisci il riferimento obsoleto a MATLAB-api con il nome attuale del repository, quindi verifica che l’updater riesca a individuare i file richiesti e non segnali più l’aggiornamento come non riuscito.