[BUG][html2] HTML2-Generator not displaying query parameters properly

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

html2 generator ignores "default" and "enum" field and the resulting url is missing a value for the query parameter.

openapi-generator version

5.1.0

OpenAPI declaration file content or url

 "servers" : [ {
    "url" : "https://my-cookies/"
  } ],
  "paths" : {
    "/api/v4/cookies/amount" : {
      "get" : {
        "summary" : "Summary",
        "description" : "Description",
        "operationId" : "get_amount",
        "parameters" : [{
          "name" : "color",
          "in" : "query",
          "description" : "Cookie color",
          "schema" : {
            "type" : "string",
            "default" : "red",
            "enum" : [ "red", "blue", "green", "yellow" ]
          }
        } ],

The entire json file and the resulting index.html file can be found here: https://gist.github.com/kas1337/7381b3764fdfe340e272958e5a9a19b8

Generation Details & Steps to reproduce

I've tested with the latest master branch as described here https://github.com/OpenAPITools/openapi-generator/wiki/FAQ#how-to-test-with-the-latest-master-of-openapi-generator using the following command (Linux)

java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate -g html2 -i openapi.json

Actual output

The resulting url in the generated documentation is missing the query parameter.

/api/v4/cookies/amount

In the CURL example the query parameter is visible but it looks like it's missing a value

curl -X GET\
 -H "Accept: application/pdf,application/json"\
 "https://my-cookies/api/v4/cookies/amount?color="

Furthermore, the "default" and "enum" fields are missing in the parameters section. Only the description is displayed.

Expected output

I would expect something like this for the url

/api/v4/cookies/amount?color={example_color}

as well as for the CURL example.

It would be nice if you could have a look into this. Thanks!

Start by running the supplied html2 generation command with the OpenAPI declaration from the issue and compare the generated index.html with the linked gist. Trace the html2 generator's parameter rendering from the generated URL and CURL example; done means the query value is represented and the default and enum fields appear in the parameters section.