fix: clear response failed context key when chat editing session is disposed (#233138)

Author: joyceerhl

src/vs/workbench/contrib/chat/browser/chatEditing/chatEditingService.ts

@@ -137,6 +137,7 @@ export class ChatEditingService extends Disposable implements IChatEditingServic
 		}));
 		this._register(this._chatService.onDidDisposeSession((e) => {
 			if (e.reason === 'cleared' && this._currentSessionObs.get()?.chatSessionId === e.sessionId) {
+				this._applyingChatEditsFailedContextKey.set(false);
 				void this._currentSessionObs.get()?.stop();
 			}
 		}));