[DOCS] Fix analyzer name

Closes #20.

Thanks to @goncha!
(cherry picked from commit 333f850)

Author: dadoonet

README.md

@@ -19,7 +19,7 @@ Please read documentation relative to the version you are using:
 
 * [3.0.0-SNAPSHOT](https://github.com/elasticsearch/elasticsearch-analysis-smartcn/blob/master/README.md)
 
-The plugin includes the `smart_chinese` analyzer, `smartcn_sentence` tokenizer, and `smartcn_word` token filter.
+The plugin includes the `smartcn` analyzer, `smartcn_sentence` tokenizer, and `smartcn_word` token filter.
 
 License
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