message: Fix comment in cc prf key template.
diff: @@ -23,7 +23,7 @@ namespace tink {
  ///////////////////////////////////////////////////////////////////////////////
  // Pre-generated KeyTemplate for Prf key types. One can use these templates
  // to generate new KeysetHandle object with fresh keys.
  -// To generate a new keyset that contains a single AesGcmKey, one can do:
  +// To generate a new keyset that contains a single HkdfPrfKey, one can do:
  //
  // auto handle_result =
  // KeysetHandle::GenerateNew(PrfKeyTemplates::HkdfSha256());
  