Update README.md

Author: mokun

README.md

@@ -1,14 +1,19 @@
-# Mars Simulation Project GitHub Repositories
+# Mars Simulation Project (mars-sim) GitHub Repositories
 
-## Issues :
+## Project Website's repo :
+https://github.com/mars-sim/mars-sim.github.io
+
+## Project Website :
+https://mars-sim.github.io
+
+## mars-sim Issue Tracker :
 https://github.com/mars-sim/mars-sim/issues
 
-## Wikis :
+## mars-sim Wikis :
 https://github.com/mars-sim/mars-sim/wiki
 
-## Codebase :
+## mars-sim Codebase :
 https://github.com/mars-sim/mars-sim-git
 
-## Project Website :
-https://mars-sim.github.io
+