fix private-keys create

[timurnkey]

Summary & Motivation (Problem vs. Solution)

Fixes this issue:

turnkey private-keys create --address-format ADDRESS_FORMAT_ETHEREUM --curve CURVE_SECP256K1 --name yolo
{
   "error": "request validation failed: validation failure list:\ntype in body should be one of [ACTIVITY_TYPE_CREATE_PRIVATE_KEYS_V2]"
}

Release Steps

See README for additional details.

• Tag the release (once approved)
• Attest (once merged)
• Create release with changelog
• Update Homebrew tap