Hello and welcome to Android Forums. Hopefully I can help you with your problem.
To check and see if that update is available for your phone, go to settings and look under "about phone" or look for "update firmware". Tap update firmware. If there is a firmware update it will start to download.
PLEASE NOT THAT IF YOU ARE ROOTED YOU WILL LOSE ROOT!!
The only other way to get that version is to see if a ROM is available with it. You will need to have a recovery such as TWRP or CWM to install it.
If you have any other questions regarding your device, I invite you to join Android Forums. We have many sections for specific devices which contain a wealth of information.