Update README.md

Author: duducheng

README.md

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 # AlignShift
 
-*AlignShift*: Bridging the Gap of Imaging Thickness in 3D Anisotropic Volumes ([MICCAI'20, early accept](https://arxiv.org/abs/2005.01969))
+*AlignShift*: Bridging the Gap of Imaging Thickness in 3D Anisotropic Volumes ([MICCAI'20, early accepted](https://arxiv.org/abs/2005.01969))
 
 ## Key contributions