Updating doc to match suggested task (Harbor Package Create)

[jaradtke-aws]

Issue #, if available:
The verbiage indicated you would be creating a package, however the commands were not complete

Description of changes:
-begin-
The example shows how to install the harbor package from the curated package list .
export CLUSTER_NAME=
eksctl anywhere generate package harbor --cluster ${CLUSTER_NAME} --kube-version 1.27 > harbor-spec.yaml
-end-

Updating to reflect
-begin-
The example shows how to generate the package manifest, then create harbor package from the curated package list .
export CLUSTER_NAME=
eksctl anywhere generate package harbor --cluster ${CLUSTER_NAME} --kube-version 1.27 > harbor-spec.yaml
eksctl anywhere create packages -f harbor-spec.yaml
-end-
As shown in other Harbor example:
https://anywhere.eks.amazonaws.com/docs/packages/harbor/addharbor/

Testing (if applicable):
N/A

Documentation added/planned (if applicable):
(see "Description" (above))

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[eks-distro-bot]

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