refactor: Use NodeConnectionType consistently across the code base (no-changelog) (#10595)

packages/nodes-base/nodes/Dhl/Dhl.node.ts

@@ -1,13 +1,14 @@
-import type {
-	IExecuteFunctions,
-	ICredentialDataDecryptedObject,
-	ICredentialsDecrypted,
-	ICredentialTestFunctions,
-	IDataObject,
-	INodeCredentialTestResult,
-	INodeExecutionData,
-	INodeType,
-	INodeTypeDescription,
+import {
+	type IExecuteFunctions,
+	type ICredentialDataDecryptedObject,
+	type ICredentialsDecrypted,
+	type ICredentialTestFunctions,
+	type IDataObject,
+	type INodeCredentialTestResult,
+	type INodeExecutionData,
+	type INodeType,
+	type INodeTypeDescription,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { dhlApiRequest, validateCredentials } from './GenericFunctions';
@@ -24,8 +25,8 @@ export class Dhl implements INodeType {
 		defaults: {
 			name: 'DHL',
 		},
-		inputs: ['main'],
-		outputs: ['main'],
+		inputs: [NodeConnectionType.Main],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'dhlApi',