Set version_added for locale_gen

system/locale_gen

@@ -11,7 +11,7 @@ module: locale
 short_description: Creates of removes locales.
 description:
      - Manages locales by editing /etc/locale.gen and invoking locale-gen.
-version_added: "1.5"
+version_added: "1.6"
 options:
     name:
         description:
@@ -148,4 +148,4 @@ def main():
 # import module snippets
 from ansible.module_utils.basic import *
 
-main()
+main()