oneCCL identified lead maintainers

[rodburns]

• Publish the names of the lead maintainers and reviewers for contributions to the project.
• Identified way to contact lead maintainers of the project published on the project README

Acceptance Criteria:

• The README or CONTRIBUTOR file lists the lead maintainers
• The README or CONTRIBUTOR file lists how to contact the project maintainers

[vbm23]

@Maria1Petrova You can refer to oneDNN Maintainer's file https://github.com/uxlfoundation/open-source-working-group/issues/9

[vbm23]

@Maria1Petrova Did the team manage to get to this one yet?

[Maria1Petrova]

https://github.com/oneapi-src/oneCCL/pull/137

[vbm23]

PR Merged