Add HPKE to algorithmFamiliesEnum

[Mehrn0ush]

Fixes #809

HPKE is defined in schema/cryptography-defs.json but missing from schema/cryptography-defs.schema.json#/definitions/algorithmFamiliesEnum. BOM 1.7 validates cryptoProperties.algorithmProperties.algorithmFamily against this enum, so valid HPKE usage fails schema validation.

This PR adds HPKE to algorithmFamiliesEnum (alphabetically between GOST and HC).

[Mehrn0ush]

@bhess Hi — whenever you have a moment, could you please take a look at this PR?

I might be missing something, but it seems HPKE is present in schema/cryptography-defs.json while missing from cryptography-defs.schema.json#/definitions/algorithmFamiliesEnum, which causes valid BOM 1.7 cryptoProperties.algorithmProperties.algorithmFamily: "HPKE" to fail schema validation.

This PR adds HPKE to the enum (Fixes #809). Happy to adjust if there’s a better approach.
Thanks!

[bhess]

Hi @Mehrn0ush, thanks for the PR. Looks good.
If I remember correctly, the algorithmFamiliesEnum was populated automatically. Is that right, @stevespringett?