Bug report, feature request or other request

**Describe the issue**
In the [OpenApiParameter], even if we pass required="true", it doesn't seems to be working.

sample:- `[OpenApiParameter(RequestHeaders.corelationID, In = ParameterLocation.Header, Required = true)]`

**To Reproduce**
Steps to reproduce the behavior:
1. Create an Azure Function. Add the nuget of "azure-functions-openapi-extension".
2. Add the line `[OpenApiParameter(RequestHeaders.corelationID, In = ParameterLocation.Header, Required = true)]'

**Expected behavior**
When we hit to the endpoint from Postman , it should throw an error, where no header is sent.

**Environment (please complete the following information, if applicable):**
- OS:- Windows
- Browser:- Edge

**Additional context**
For reference :-[ Stack OverFlow](https://stackoverflow.com/questions/76943616/openapiparametermandatory-header-not-working/76945313?noredirect=1#comment135644980_76945313)

Start at the OpenApiParameter attribute on the Azure Functions endpoint and compare the generated OpenAPI document with the request behavior in Postman. Determine whether Required=true is intended only to describe the API contract or to enforce runtime validation; done means the expected behavior is verified and documented.

Written by the indexing model from the issue text.