Bump version to 8.2.1

Author: pquentin

README.md

@@ -19,14 +19,14 @@ ES-Hadoop 2.0.x and 2.1.x are compatible with Elasticsearch __1.X__ *only*
 
 ## Installation
 
-### Stable Release (currently `8.2.0`)
+### Stable Release (currently `8.2.1`)
 Available through any Maven-compatible tool:
 
 ```xml
 <dependency>
   <groupId>org.elasticsearch</groupId>
   <artifactId>elasticsearch-hadoop</artifactId>
-  <version>8.2.0</version>
+  <version>8.2.1</version>
 </dependency>
 ```
 or as a stand-alone [ZIP](http://www.elastic.co/downloads/hadoop).