Remove backticks (`) from "protocol" and rename it.

[ambrusha]

New Issue Checklist

• [x] Updated the plugin to the latest version
• [x] I read the Contribution Guidelines
• [x] I read the documentation TRY TO UPDATE WIKI...
• [x] I searched for existing GitHub issues

Issue Description

Remove backticks (`) from "protocol" and rename it.

func urlSession(
        _ session: URLSession,
        webSocketTask: URLSessionWebSocketTask,
        didOpenWithProtocol protocol: String?
    ) {
        if let sessionDelegate = self.sessionDelegate as? URLSessionWebSocketDelegate {
            sessionDelegate.urlSession?(
                session,
                webSocketTask: webSocketTask,
                didOpenWithProtocol: `protocol`
            )
        }
    }

As you can see I don't use any custom names... just passing property from one func to another. But CI's Sonar gives me an error.

Environment

 Enterprise EditionVersion 10.3 (build 82913)