fix clean json response

src/llmUtil.jl

@@ -545,10 +545,12 @@ julia> clean_json_response(text)
 ```
 """
 function clean_json_response(text::String)
-  text = replace(text, '{' => "")
-  text = replace(text, '}' => "")
-  text = replace(text, "```" => "")
-  text = replace(text, "json" => "")
+  removelist = ["{", "}", "```", "json"]
+  for i in removelist
+    while occursin(i, text)
+      text = replace(text, i => "")
+    end
+  end
   text = '{' * text * '}'
   return text
 end