message: docs: fix CDN example fetcher text fallback
diff: body: JSON.stringify(graphQLParams),
  credentials: 'include',
  }).then(function(response) {
  - try {
  - return response.json();
  - } catch (error) {
  - return response.text();
  - }
  + return response.json()
  + .catch(function () { return response.text(); });
  });
  }
  