Change "serialized TLS structure" to 'SCT'

In the Section 'Including the Signed Certificate Timestamp in the TLS Handshake':
The 'SerializedSCT sct_list' is defined as "an opaque byte string that contains the serialized TLS structure." I believe this should read "the serialized SCT structure"

[This wording is also in the original RFC, would that warrant an errata report?]