Translations update from Weblate

Translations update from Weblate for AlekSIS/AlekSIS-App-Matrix-Frontend.

Current translation status:

aleksis/apps/matrix/frontend/messages/ru.json

+{
+  "matrix": {
+    "menu_title": "Matrix",
+    "rooms": {
+      "menu_title": "Группы и комнаты"
+    }
+  }
+}