[Defect]: Missing variable {dkLen} in HKDF[-{hashFunction}] variant of the algorithm family HKDF

[meghsaha-ibm]

Describe the defect

Missing variable {dkLen} in HKDF[-{hashFunction}] variant of the algorithm family HKDF.

Additional context

The issue is data-quality / naming defect in the Cryptography Registry and can be fixed without changing schema behavior or introducing new algorithms.

[stevespringett]

cc: @bhess