Fix beta builds

The extension's beta name strings were missing.

Change-Id: I0245671c627aced507a9c6460bd6b852aaf1ebaa
diff --git a/src/_locales/ru/messages.json b/src/_locales/ru/messages.json
index f27b5b8..85d5ba7 100644
--- a/src/_locales/ru/messages.json
+++ b/src/_locales/ru/messages.json
@@ -107,6 +107,9 @@
    "name": {

       "message": "Захват экрана"

    },

+   "name_beta": {

+      "message": "Захват экрана (beta)"

+   },

    "ok": {

       "message": "OK"

    },