message: Update README.md
  Fix issue with JSON description keys.
diff: To add a product, add it to `graveyard.json` file. You'll need the following information:
  - Name of Product (`name`)
  -- Launch Date (`dateOpened`)
  -- Discontinued Date (`dateClosed`)
  +- Launch Date (`dateOpen`)
  +- Discontinued Date (`dateClose`)
  - Description (`description`)
  - Link (`link`)
  