Update junit-jupiter.md. to reflect v3 method signature

[rahultumpala]

Method Signature for ResponseTemplateTransformer has changed in v3.
I've made changes in the document to reflect the same.

The following snippet is the actual constructor method in v3.10.0

public ResponseTemplateTransformer(TemplateEngine templateEngine, boolean global, FileSource files, List<TemplateModelDataProviderExtension> templateModelDataProviders) {
        this.templateEngine = templateEngine;
        this.global = global;
        this.files = files;
        this.templateModelDataProviders = templateModelDataProviders;
    }

[leeturner]

Many thanks for your contribution. We do have another example of the use of this constructor in the response templating page. It looks something like this:

new ResponseTemplateTransformer(
              getTemplateEngine(),
              options.getResponseTemplatingGlobal(),
              getFiles(),
              templateModelProviders
            )

Could we keep it consistent and use the same parameters to the contructor in your update. Once that is updated, I will merge the change.

[rahultumpala]

Yes, I will make the change.

[rahultumpala]

@leeturner although it's a minor change I got occupied with work and couldn't get onto this early. I modified the document to reflect v3 definition and be consistent with Response Templating page. Please merge when you're free. Thanks.

[leeturner]

Awesome, thank you for your contribution