[Q] what is the latest official rom for my P8

Hello out there!!

I live France and have the Huawei P8.
My carrier is Orange
The build number on the phone is GRA-L09V100R001C109B121
Android version is 5.0
EMUI is 3.1
Custom version is CUSTC109D250

The phone is running great, no problems..
Can someone tell me if I'm running the latest version of the rom? If not, what is latest version for this phone?
Also, where can I go to get it updated.

Thank you!!