Fixed Typo (#22)

Author: irahulcse

docs/index.md

@@ -1,6 +1,6 @@
 # Simulation Software Engineering
 
-Welcome to the homepage of the course "Simulation Software Engineeering" at the University of Stuttgart.
+Welcome to the homepage of the course "Simulation Software Engineering" at the University of Stuttgart.
 You find general information about the course under [course information](course-information.md) and in the video below.
 
 <p align="center">