message: Fix the spelling of a single word
diff: "Stream_started": "Stream started",
  "HTTPS_REQUIRED": "This action requires an encrypted connection.",
  "EXTENSION_UNAVAILABLE": "You need a browser extension/addon.",
  - "UNKNOWN_ERROR": "An unknown error occured.",
  + "UNKNOWN_ERROR": "An unknown error occurred.",
  "Install_extension": "Please install the extension in order to use screen sharing: ",
  "Connection_accepted": "Connection accepted",
  "Stream_terminated": "Stream terminated",
  