Update README.md

Author: Juan E. Sanchez

README.md

@@ -1,6 +1,6 @@
 # devsim_bjt_example
 BJT publication examples
 
-This project contains the simulation files for the paper "Semiconductor Device Simulation Using DEVSIM", available from http://www.devsim.org/index.php/Documentation.
+This project contains the simulation files for the paper "Semiconductor Device Simulation Using DEVSIM", available from http://www.devsim.org/introduction.html#documentation.
 
 To download these files, either clone this project, or get the zip files from https://github.com/devsim/devsim_bjt_example/releases.