Google started to roll out the Android 7.1.1 Nougat update to the Pixel and Pixel XL handsets last week and now a new version of the update has been released.
The updated Android 7.1.1 update has been rolled out in the US and Europe and it apparently comes with a number of bug fixes and improvements.
The new update apparently fixes an issue relating to cellular, this issue only affected some carriers, like O2 in the UK.
The update has been released as an over the air update on both handsets and you can check to see if it is available from the settings menu.
Source 9 to 5 Google