doc: Fix Chrome negotiation whitelist
doc: Fix Chrome negotiation whitelist

All current versions of Google Chrome use
AuthNegotiateDelegateWhitelist for this argument.

Closes #4642
Signed-off-by: Stephen Gallagher <ff239cad7a3e5aa2b398edf92aa8c4be6690609b@redhat.com>
Reviewed-by: Marius Vollmer <bb11c6e942c5cc765df5f04da146b3198127a7a3@redhat.com>

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