Refactor: change parameter name for more easy-understand

[a2ush]

Issue #, if available:

It's hard to understand what value the parameter has due to the short name "v". "v" parameter has data as the following;

Resource {
    Type: "AWS::Diagram::Cloud",
    Icon: "",
    Direction: "",
    Preset: "AWSCloudNoLogo",
    Align: "center",
    FillColor: "",
    Title: "",
    TitleColor: "",
    Font: "",
    Children: [] string {
        "SampleFargateCluster"
    }
}

Description of changes:

• Change parameter name for more easy-understand

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