Update translation_RU.json. Fixed a phrase that was too long causing temperature values to not fit on the sleep screen.

The sleep indication phrase in simple mode is too long "Хххррп". The temperature value does not fit on the screen. Replaced it with the original phrase "Zzzz", understandable in all languages.

Translations/translation_RU.json

@@ -52,7 +52,7 @@
             "message": "Питание(В):\n"
         },
         "SleepingSimpleString": {
-            "message": "Хххррп"
+            "message": "Zzzz"
         },
         "SleepingAdvancedString": {
             "message": "Сон...\n"