[BUG] Extra bracket in generate help for --http-user-agent option example

Created by: DiscoPYF

Bug Report Checklist

Have you provided a full/minimal spec to reproduce the issue?
Have you validated the input using an OpenAPI validator (example)?
What's the version of OpenAPI Generator used?
Have you search for related issues/PRs?
What's the actual output vs expected output?
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Description

When running the following command: openapi-generator help generate

The example of the --http-user-agent option contains an extra closing curly bracket:

--http-user-agent <http user agent>
            HTTP user agent, e.g. codegen_csharp_api_client, default to
            'OpenAPI-Generator/{packageVersion}}/{language}'

It seems {packageVersion}} should be {packageVersion}. I assume this is a typo, given that {language} contains only one bracket.

This is trivial but I figured it's worth fixing anyway.

openapi-generator version

4.3.1

OpenAPI declaration file content or url

Command line used for generation

openapi-generator help generate

Steps to reproduce

Install openapi-generator:

npm install @openapitools/openapi-generator-cli -g

Run the generate help:

openapi-generator help generate

Related issues/PRs

I searched but haven't found a similar issue.

Suggest a fix

Simply remove the extra closing curly bracket.