Update app.py

app.py

@@ -58,7 +58,7 @@ def chat():
             result_list = str(datetime.timedelta(seconds=sec)).split(".")
             print("응답 시간 : " + result_list[0] +"\nresult:"+ result)
             
-            headers = {'Content-Type': 'application/json
+            headers = {'Content-Type': 'application/json'}
             data = {
                         "version": "2.0",
                         "template": {