README.md in hnswlib-0.2.0 vs README.md in hnswlib-0.3.0

@@ -33,19 +33,19 @@
 
 ```ruby
 require 'hnswlib'
 
 f = 40 # length of item vector that will be indexed.
-t = Hnswlib::Index.new(n_features: f, max_item: 1000)
+t = Hnswlib::HnswIndex.new(n_features: f, max_item: 1000)
 
 1000.times do |i|
   v = Array.new(f) { rand }
   t.add_item(i, v)
 end
 
 t.save('test.ann')
 
-u = Hnswlib::Index.new(n_features: f, max_item: 1000)
+u = Hnswlib::HnswIndex.new(n_features: f, max_item: 1000)
 u.load('test.ann')
 p u.get_nns_by_item(0, 100) # will find the 100 nearest neighbors.
 ```
 
 ## License