Update documentation to include information on WG leads and Chairs

[anishasthana]

This follows up on #3827

Add a section for WG Leads and WG Chairs

[anishasthana]

cc @andreyvelich

[andreyvelich]

/good-first-issue

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[anishasthana]

/assign me

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[anishasthana]

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[anishasthana]

@andreyvelich Should we move some of the contents of https://github.com/kubeflow/community/blob/master/wgs/wg-governance.md#all-leads over to https://www.kubeflow.org/docs/about/membership/? So there aren't two sources of truth for WG leads and chairs.

[andreyvelich]

@andreyvelich Should we move some of the contents of https://github.com/kubeflow/community/blob/master/wgs/wg-governance.md#all-leads over to https://www.kubeflow.org/docs/about/membership/? So there aren't two sources of truth for WG leads and chairs.

Sure, maybe we can combine information from https://github.com/kubeflow/community/blob/master/wgs/wg-governance-requirements.md and https://github.com/kubeflow/community/blob/master/wgs/wg-governance.md, and write it into website.
I would suggest to remove those docs from the kubeflow/community after it.