KEP-5: Update metadata
KEP-5: Update metadata

Add Paris as approver and Jorge as reviewer. Also list SIG-Docs as participating as they are certainly interested in how this pans out.

Signed-off-by: Joe Beda <bc91516b0d0039bd81761623a777782b34504bb2@bedafamily.com>

kubernetes/enhancements,kubernetes/enhancements,kubernetes/enhancements