Honestly that small of a difference you barely need any acclimation to the salinity. Still a good idea to, sure, but that's such a small change I would really worry. Drip acclimate if you want or even just float the bag to equalize temp and then add some tank water a bit at a time over 5-10 minutes and you're golden.
Thanks guys! I added two green chromis to a existing 1 that I’ve had for 2.5 years and he was beating the hell out of them. I hope he tolerates them tomorrow but I think I know how it’s gonna turn out