Fix `credhub-cli` download path #6447

Job	Run time
/ Create pending check	4s
/ Deploy for Acceptance Tests - Broker	12m 39s
/ [ API ] Acceptance Tests - Broker	10m 26s
/ [ APP ] Acceptance Tests - Broker	23m 59s
/ [ Broker ] Acceptance Tests - Broker	8m 9s
/ Acceptance Tests - Broker Result	6s
/ Deployment cleanup	3m 2s
	58m 25s

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