[BUG] [CSharp] Api methods generates without variable name

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?
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Description

Hello, so I've updated from 7.0.1 to 7.8.0 and weirdly the constructor variables are without name...
I was expecting it not to change anything aside from the methods I joined in a previous PR.
I've tested the versions and with started happening from 7.5.0 upwards.

openapi-generator version

7.8.0

OpenAPI declaration file content or url

Here the Yaml I'm using.
https://gist.github.com/filipe-silva/bfe824f2a6b2ea170cd29ea4c326ab4d

Generation Details

Steps to reproduce

Simply generate the code using the terminal:
npx @openapitools/openapi-generator-cli generate -c openapi-dotnet.yaml

openapi-dotnet.yaml content:

{
  "$schema": "./node_modules/@openapitools/openapi-generator-cli/config.schema.json",
  "spaces": 2,
  "generator-cli": {
    "version": "7.8.0"
  }
}

Suggest a fix

Couldn't figure out what was the breaking change, if someone can point me in the right direction I'll fix it.

Start with the openapi-dotnet.yaml configuration and the linked OpenAPI declaration, then run the supplied npx @openapitools/openapi-generator-cli generate command using version 7.8.0. Compare the generated C# API methods with output from 7.0.1 and identify the change introduced in 7.5.0 or later. Done means generated methods contain the expected variable names without regressing the reported constructor behavior.