add link to release info

Author: PhilippSalvisberg

docs/index.md

@@ -70,5 +70,4 @@ Version | Who         | Date         | Comment
 3.1     | Troller     | April 2016   | Corrections
 3.2     | Salvisberg  | January 2017 | Various small corrections
 3.3     | Salvisberg  | 07.07.2018   | Migrated from Microsoft Word document to [MkDocs](https://www.mkdocs.org/), added missing reasons, prefixed rules with "G-" as in PL/SQL Cop.
-3.4     |             |              | work in progress
-
+3.4     | Salvisberg  | 20.09.2019   | See [Relase Information](https://github.com/Trivadis/plsql-and-sql-coding-guidelines/releases/tag/v3.4)