Proposal for an A.2 lineage sequenced 2 times: in UK and recently in US-PA

[corneliusroemer]

With the recent upload of another A.2 sequence from US-PA, there's a new cluster in A.2 that may deserve a designation to be able to talk about this cluster.

https://nextstrain.org/monkeypox/hmpxv1/2022-09-22?c=gt-nuc_67611,130231,159277&label=id:141ea44c&m=div

Lots of defining mutations (~20):
G11948A, C14790T, G21991A, G23118A, G38923A, G39515A, G56546A, G57786A, G93312A, C103019T, C112470T, C124129T, G135303A, G145902A, C149365T, G158424A, G162640A, G186984A, C127906T, G155611A