[C#] Use html entities in javadoc of generated code

[wing328]

Description

Similar to #106, we want to apply similar fix to C# client: https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/csharp/api.mustache#L33

openapi-generator version

Latest master

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/csharp/api.mustache#L33

Suggest a fix/enhancement

This change should be fairly straightforward. If anyone wants to help on this, please reply to let us know.

[albator1932]

Hi guys,

I checked the source and it appears that it is already {{.}} instead of {{{.}}} (which looks like correct to me).
Is this still an issue or am I missing something?

[wing328]

@albator1932 thanks for the review. I couldn't find again on which line we need to apply similar fix. If I find it, I'll reopen this issue to let you know.

Thanks again for offering help on this.