change "old" to "version 1.6"

A (old) google-java-format Eclipse plugin [...]
==>
Version 1.6 of the google-java-format Eclipse plugin [...]

Author: av1m

README.md

@@ -55,8 +55,7 @@ and import it into File→Settings→Editor→Code Style.
 
 ### Eclipse
 
-A (old) 
-[google-java-format Eclipse plugin](https://github.com/google/google-java-format/releases/download/google-java-format-1.6/google-java-format-eclipse-plugin_1.6.0.jar)
+Version 1.6 of the [google-java-format Eclipse plugin](https://github.com/google/google-java-format/releases/download/google-java-format-1.6/google-java-format-eclipse-plugin_1.6.0.jar)
 can be downloaded from the releases page. Drop it into the Eclipse
 [drop-ins folder](http://help.eclipse.org/neon/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Freference%2Fmisc%2Fp2_dropins_format.html)
 to activate the plugin.