I had something similar happen in a past year.
If you used one of the software packages (Turbotax, H&R, Taxact, etc)... it's a no brainer to file an update. I haven't done it by hand, but from comments above it also sounds pretty no brainer. It will probably make $0 difference in taxes (or $3 maybe...) but: will you worry ever so slightly that "it is wrong, what now?" If so, just do it.
I might wait until closer to April. You may very well get another change between now and then. The time it happened to me, the late form came AFTER April 15.