refactor: Migrate NodeConnectionType to const object type (no-changelog) (#14078)

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

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

@@ -6,7 +6,7 @@ import {
 	type INodePropertyOptions,
 	type INodeType,
 	type INodeTypeDescription,
-	NodeConnectionType,
+	NodeConnectionTypes,
 } from 'n8n-workflow';
 
 import { customFieldFields, customFieldOperations } from './CustomFieldDescription';
@@ -29,8 +29,8 @@ export class ConvertKit implements INodeType {
 			name: 'ConvertKit',
 		},
 		usableAsTool: true,
-		inputs: [NodeConnectionType.Main],
-		outputs: [NodeConnectionType.Main],
+		inputs: [NodeConnectionTypes.Main],
+		outputs: [NodeConnectionTypes.Main],
 		credentials: [
 			{
 				name: 'convertKitApi',