Update release date

Author: dadoonet

README.md

@@ -11,7 +11,7 @@ Versions
 
 | elasticsearch-beyonder  | elasticsearch | Release date |
 |:-----------------------:|:-------------:|:------------:|
-| 6.5-SNAPSHOT            | 6.5 -> 6.x    |              |
+| 6.5                     | 6.5 -> 6.x    |  2019-01-04  |
 | 6.3                     | 6.3 -> 6.4    |  2018-07-21  |
 | 6.0                     | 6.0 -> 6.2    |  2018-02-05  |
 | 5.1                     | 5.x           |  2017-07-12  |