Update README.md

README.md

 **Click here for more details:**
 https://tourlomousis.pages.cba.mit.edu/3dp-mini-linear-axes
 
-This is a part of the tools developed at the 
+Part of the tools developed at the 
 **Machines That Make Machines Class**
 Link: http://fab.cba.mit.edu/classes/865.18/projects/index.html