Updating security reachout email

[varun-lodaya]

Is your feature request related to a problem? Please provide an existing Issue # , or describe. Documentation change

Describe the solution you are proposing Updating security reach out email address from aws-security@amazon.com to security@opensearch.org.

Describe alternatives you've considered N/A

Additional context N/A

Check List

• ~[ ] Backport Labels added.~
• ~[ ] New functionality includes testing.~
  • ~[ ] All tests pass~
• [x] New functionality has been documented.
  • ~[ ] New functionality has javadoc added~
• [x] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[varun-lodaya]

Can somebody help merge the changes, the CI failures look unrelated.