doc (examples): use "k-means||" , not "k-means++".

dask_ml does not work with the "k-means++" method on version 2024.4.4.

doc/plot/plot_kmeans.py

@@ -12,7 +12,7 @@ virginica = data[iris_data.target == 2]
 
 # Training KMeans
 # 3 clusters with a feature dimensionality of 2
-machine = KMeansMachine(n_clusters=3, init_method="k-means++").fit(data)
+machine = KMeansMachine(n_clusters=3, init_method="k-means||").fit(data)
 
 predictions = machine.predict(data)