fix: print DeleteNetworkContainerRequestBody correctly in log

[ZetaoZhuang]

Reason for Change:

Issue Fixed:

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests

Notes:

[rbtr]

please align with the other String() methods in this file
ex:

azure-container-networking/cns/NetworkContainerContract.go

Lines 560 to 564 in 4e94aca

	func (u UnpublishNetworkContainerResponse) String() string {
	// %q as a verb on a byte slice prints safely escaped text instead of individual bytes
	return fmt.Sprintf("{Response:%+v UnpublishErrorStr:%s UnpublishStatusCode:%d UnpublishResponseBody:%q}",
	u.Response, u.UnpublishErrorStr, u.UnpublishStatusCode, u.UnpublishResponseBody)
	}

[ZetaoZhuang]

please align with the other String() methods in this file ex:

azure-container-networking/cns/NetworkContainerContract.go

Lines 560 to 564 in 4e94aca

	func (u UnpublishNetworkContainerResponse) String() string {
	// %q as a verb on a byte slice prints safely escaped text instead of individual bytes
	return fmt.Sprintf("{Response:%+v UnpublishErrorStr:%s UnpublishStatusCode:%d UnpublishResponseBody:%q}",
	u.Response, u.UnpublishErrorStr, u.UnpublishStatusCode, u.UnpublishResponseBody)
	}

updated. thanks