doc: add AES-OCB to aesKeyGenParams.name - #65181

Description

The aesKeyGenParams.name value list in doc/api/webcrypto.md omits
'AES-OCB', even though AES-OCB key generation is supported:

• lib/internal/crypto/util.js dispatches AES-OCB's generateKey
  through the AesKeyGenParams dictionary, and it works at runtime:

  $ node -e "crypto.subtle.generateKey({ name: 'AES-OCB', length: 256 }, true, ['encrypt', 'decrypt']).then((k) => console.log(k.algorithm))"
  { name: 'AES-OCB', length: 256 }

• The sibling aesDerivedKeyParams.name list in the same document
  already includes 'AES-OCB', and so does the list of algorithms
  supported by generateKey() — so the omission is an internal
  inconsistency.

This adds 'AES-OCB' to the aesKeyGenParams.name list so the value
lists agree. Documentation-only change.