Remove new keyword from README.md

Removed the new keyword in some examples

Checklist

[x] Tick to sign-off your agreement to the Developer Certificate of Origin (DCO) 1.1
[ ] Added tests for code changes or test/build only changes N/A
[ ] Updated the change log file (CHANGES.md|CHANGELOG.md) or test/build only changes N/A
[x] Completed the PR template below:

Description

Removed the new keyword in some examples of the use of Cloudant. Using the new Cloudant is a syntax error now so it should be removed from the README.md

Approach

I just updated the README.md.

Schema & API Changes

"No change"

Security and Privacy

N/A README.md only changes

Monitoring and Logging