Command: ios keychain update

Usage: ios keychain update --account <account> --service <service> --newData <data>

Updates an entry in the iOS keychain with new data. All parameters are required.

Flags:
   --account   The account name (required)
   --service   The service name (required)
   --newData   The new data to store (required)

Examples:
   ios keychain update --account user@example.com --service com.example.app --newData "newsecret"
