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

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

@@ -1,4 +1,5 @@
 import type { INodeType, INodeTypeDescription } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { questionsFields, questionsOperations } from './QuestionsDescription';
 
@@ -20,8 +21,8 @@ export class Metabase implements INodeType {
 		defaults: {
 			name: 'Metabase',
 		},
-		inputs: ['main'],
-		outputs: ['main'],
+		inputs: [NodeConnectionType.Main],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'metabaseApi',