Update upgrade.md (#4844)

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Wang Jie 2017-10-10 01:18:42 +08:00 committed by Jim Galasyn
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@ -41,7 +41,7 @@ healthy, before upgrading other nodes.
|`--interactive, i`|Run in interactive mode and prompt for configuration values|
|`--admin-username`|The UCP administrator username|
|`--admin-password`|The UCP administrator password|
|`--pull`|Pull UCP images: 'always', when 'missing', or 'never'|
|`--pull`|Pull UCP images: `always`, when `missing`, or `never`|
|`--registry-username`|Username to use when pulling images|
|`--registry-password`|Password to use when pulling images|
|`--id`|The ID of the UCP instance to upgrade|