Move Venafi Gen2 CT Log to Rejected
Move Venafi Gen2 CT Log to Rejected

Update the informational tables in README.md to reflect Venafi Gen2 CT Log transitioning from Read Only to Rejected, per https://groups.google.com/a/chromium.org/d/msg/ct-policy/ltiBZC_9goI/FdkiyxmNBAAJ
GoogleChrome/CertificateTransparency,GoogleChrome/CertificateTransparency-todelete