Correct to make sure it's == to what we have in #1897.

Of course I made a mistake…  This is the correct value which matches:

https://github.com/slava77/cmssw/blob/5a70016b3e310d262309211092e896f552954eca/PhysicsTools/PatAlgos/python/recoLayer0/jetCorrFactors_cfi.py

@slava77 @thspeer @vadler.