Add Derek Ho (github: derek-ho) as a maintainer

[cwperks]

I have nominated, and maintainers have agreed to add Derek Ho (@derek-ho) as a co-maintainer, who has kindly accepted.

Derek has made many valuable contributions and given insightful comments on reviews in many PRs over the last year.

Notable code contributions from Derek include:

• Add initial changes to expose an endpoint for auth failure listener get call: Add initial changes to expose an endpoint for auth failure listener get call #4641
  • This change is a good example of an enhancement to the security plugin to deliver value to the community
• Add cat/alias support for DNFOF: Add cat/alias support for DNFOF  #4436
• Add support for ipv6 ip address in user injection: Add support for ipv6 ip address in user injection #4399
• Use GHA derek-ho/start-opensearch for OpenSearch plugin install tests: Use GHA derek-ho/start-opensearch for OpenSearch plugin install tests #4063

Derek has engaged in maintenance of the code base by submitting numerous bug fixes and improving CI checks. Here are some examples:

• Removes unused get/post/put cache endpoint: Removes unused get/post/put cache endpoint #4761
• Update PR template to raise awareness of security dashboards plugin static list: Update PR template to raise awareness of security dashboards plugin static list #4476
• Fix Bug with Install demo configuration running in cluster mode with -y: Fix Bug with Install demo configuration running in cluster mode with -y #3935

See all code contributions (Open + Closed) from Derek here: https://github.com/opensearch-project/security/commits?author=derek-ho

Derek also routinely opens up issues on the Security repo with valuable feature requests and reports of deficiencies (28 in total):

• See issues submitted by Derek here: https://github.com/opensearch-project/security/issues?q=is%3Aissue+author%3Aderek-ho

Derek regularly contributes to conversation on Pull Requests and other issues (including RFCs):

• Insightful comment from Derek on an RFC: [Decision Issue] User Experience for RPM/DEB distributions with default admin credential changes #3916 (comment)
• Example where Derek contributed valuable insight on a PR: Fixes authtoken endpoint #4628 (comment)
• Example where Derek contributed valuable insight in an issue: Docker distribution should reflect changes to default admin credentials in demo configuration #3705 (comment)

See all PRs where Derek has engaged as a commenter: https://github.com/opensearch-project/security/pulls?q=is%3Apr+commenter%3Aderek-ho

See all issues where Derek has engaged as a commenter: https://github.com/opensearch-project/security/issues?q=is%3Aissue+commenter%3Aderek-ho

Additionally, Derek is active in the community and has given a talk at OpenSearch Con SF: https://www.youtube.com/watch?v=lU2QxmhvtWo