added iris example jpeg

Author: PyDataBlog

docs/src/index.md

@@ -87,8 +87,11 @@ scatter(iris.PetalLength, iris.PetalWidth, marker_z=result.assignments,
         color=:lightrainbow, legend=false)
 
 # TODO: Add scatter plot image
+
 ```
 
+![Image description](iris_example.jpg)
+
 #### Elbow Method For The Selection Of optimal number of clusters
 ```julia
 using ParallelKMeans