Update: For those interested, here's the version for updating from Android 5.1.0 (LMY47D/LMY47I) to Android 5.1.1 (LMY48B):
https://gist.github.com/eyecatchup/dab5cf7977008e504213
UPDATE `NEXUS 5`
SET `VERSION`='5.0.1', `BUILD`='LRX22C', `RECOVERY`='CUSTOM', `ROOTED`=1
WHERE `VERSION`='5.0' && `BUILD`='LRX21O' && `RECOVERY`='CUSTOM' && `ROOTED`=1
&& `WANNA_KEEP_USERDATA`=1;