Update app.py

app.py

@@ -64,7 +64,7 @@ def ai_generated_test_sapling(text):
 def ai_generated_test_copyleak(text):
 
     conn = http.client.HTTPSConnection("api.copyleaks.com")
-    payload = f"{\n  \"text\": \"{text}\"\n}"
+    payload = "{\n  \"text\": \"" + text + ""\"\n}"
     
     headers = {
         'Authorization': "",