There is no 10.3.4 for your device and it's not necessary. The GPS Rollover on November 3rd prevents older devices (from 2011 & 2012) to fetch the correct Date & Time and therefore some services will not work anymore, but your iPad Air is from 2013 and it's not affected, as the GPS reciever module has already been updated.
Affected devices include:
iPhone 4s
iPhone 5 (NOT the 5c, 5s or SE)
iPad 2nd gen, 3rd gen and 4th gen but only the cellular models
iPad mini 1st gen cellular model only
See:
https://support.apple.com/en-us/HT210239
You need to do nothing, your device isn't affected by this.