updating link for documentation in README

Author: arjutsw

README.md

@@ -6,7 +6,7 @@ This suite of software was designed to detect morphological motifs, such as bleb
 
 It is associated with the paper, ***Robust and automated detection of subcellular morphological motifs in 3D microscopy images***, written by Meghan K. Driscoll, Erik S. Welf, Andrew R. Jamieson, Kevin M. Dean, Tadamoto Isogai, Reto Fiolka, and [Gaudenz Danuser](https://www.utsouthwestern.edu/labs/danuser/). 
 
-For more information, please read the [User Guide](doc/Morphology3DPackage.pdf).
+For more information, please read the [User Guide](doc/usersGuide_usurface3D.pdf).
 
 Example data is provided [here](https://cloud.biohpc.swmed.edu/index.php/s/Z9j62w2FCareyJY/download).