fix README

Author: pbobruk

README.md

@@ -11,6 +11,7 @@ Originally created by https://github.com/monterail/elasticsearch-analysis-morfol
 
 ```
 bin/elasticsearch-plugin install pl.allegro.tech.elasticsearch.plugin:elasticsearch-analysis-morfologik:9.2.1
+```
 
 *tip: select proper plugin version, should be the same as elasticsearch version*