Update README.md

Author: nilesh-patil

README.md

@@ -16,7 +16,7 @@ I'll try to move forward in *plot-focused* path for this tutorial.
 
     b. Adding Colour,Shape & Size aesthetics
 
-![Plot:](images/CombinedPlots.png)
+![Plot:](./images/CombinedPlots.png)
 
 ##### 2. Line Charts #####