[skip ci] Update README.md

README.md

-WOLF - Windowed Localization Frames | GNSS Plugin
-===================================
+WOLF GNSS Plugin
+================
 
-For installation guide and code documentation, please visit the [documentation website](http://mobile_robotics.pages.iri.upc-csic.es/wolf_projects/wolf_lib/wolf-doc-sphinx/).
+For installation guide and code documentation, please visit the [documentation website](http://www.iri.upc.edu/wolf).