Fix a variable name in the command

[klaudiagrz]

Description

The GCP Broker documentation includes the line:

kubectl create secret generic gcp-broker-data --from-file=sa-key={filename} --from-literal=project-name={gcp-project} --namespace {namespace}

To spare possible confusion for users, it might be cunning to replace gcp-project with gcp-project-id, as it is the project ID (and not project name) that is required.

Changes proposed in this pull request:

• Fix a variable name in the command from {gcp-project} to {GCP_PROJECT_ID}

Related issue(s)

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[kazydek]

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