Update 2nd Committee speech records that don't have 981 $b 2nd Committee

[viola-v]

Issue #1090 fixes this for new records, but we still have many 2nd Committee speech records that are missing 981 $b 2nd Committee - needs a batch update once new release has been deployed?

https://metadata.un.org/editor/records/bibs/search?q=089%3A%27B22%27+AND+791%3AA%2FC.2%2F*+AND+NOT+981__b%3A%272nd+Committee%27&start=1&limit=250&sort=symbol&direction=asc&search=089%3A%27B22%27&format=brief

(Confirm that query is correct)