message: Update Google Sidewiki description.
diff: {
  "dateClose": "2011-09-02",
  "dateOpen": "2009-09-23",
  - "description": "A browser sidebar tool that allowed users to contribute information to any web page.",
  + "description": "Google Sidewiki was a browser sidebar tool that allowed users to contribute information to any web page.",
  "link": "https://en.wikipedia.org/wiki/Google_Sidewiki",
  "name": "Google Sidewiki"
  },
  