personal_sign spec and docs are incorrect about signature length

[lukaw3d]

Spec and docs say:

api-specs/openrpc.yaml

Line 250 in 6d6ba82

description: A hex-encoded 129-byte array starting with `0x`.

But personal_sign signatures are 65-bytes long, e.g.:

• 0x587c03f5289ecc735901934bd7c60266848212bb6609e7865885963e9884b2ac68c05b61307aca7ad3fffb62ff9f37eab85f93e8bf4fb84c720d99c8598086871b
• 0x6449b69d356d6cded96ae3d0a30ad041b2a070a21d9b88047a4c377a1fe655646bb0b69e17201203e1131b0f7103db242c1bd87b0c72fa57f5782e7f7ec127451c