Update datahub/gms README.md : Create Group curl command syntax

[sattsb]

Describe the bug The curl command in the page is erroneous.

Please modify the "urn:li:corpUser:datahub" to "urn:li:corpuser:datahub" etc in the entire command

[github-actions[bot]]

This issue is stale because it has been open for 30 days with no activity. If you believe this is still an issue on the latest DataHub release please leave a comment with the version that you tested it with. If this is a question/discussion please head to https://slack.datahubproject.io. For feature requests please use https://feature-requests.datahubproject.io

[github-actions[bot]]

This issue was closed because it has been inactive for 30 days since being marked as stale.