Update README.md

Author: mokun

README.md

@@ -1,6 +1,6 @@
 # Mars-Sim Example
 
-This is a web site for the MarsSim project using [Hugo](https://gohugo.io). with the [Docsy](https://www.docsy.dev/) theme.
+This is a web site for the Mars-Sim project using [Hugo](https://gohugo.io). with the [Docsy](https://www.docsy.dev/) theme.
 
 ## Running the website locally