update README.md

Author: howarder3

README.md

@@ -208,13 +208,13 @@ Import Git Repository，選擇你剛剛 fork 的專案 import
 
 |環境變數名稱             |預設值           |說明 |
 |------------------------|--------------- |-----|
-| OPENAI_MODEL            | "text-davinci-003" | 請參考 OpenAI 對 [model](https://beta.openai.com/docs/api-reference/completions/create#completions/create-model) 的敘述|
+| OPENAI_MODEL            | text-davinci-003 | 請參考 OpenAI 對 [model](https://beta.openai.com/docs/api-reference/completions/create#completions/create-model) 的敘述|
 | OPENAI_TEMPERATURE      | 0               | 請參考 OpenAI 對 [temperature](https://beta.openai.com/docs/api-reference/completions/create#completions/create-temperature) 的敘述|
 | OPENAI_FREQUENCY_PENALTY| 0               | 請參考 OpenAI 對 [frequency_penalty](https://beta.openai.com/docs/api-reference/completions/create#completions/create-frequency_penalty) 的敘述|
 | OPENAI_PRESENCE_PENALTY | 0.6             | 請參考 OpenAI 對 [presence_penalty](https://beta.openai.com/docs/api-reference/completions/create#completions/create-presence_penalty) 的敘述|
 | OPENAI_MAX_TOKENS       | 240             | 請參考 OpenAI 對 [max_tokens](https://beta.openai.com/docs/api-reference/completions/create#completions/create-max_tokens) 的敘述|
 | MSG_LIST_LIMIT          | 20              | prompt參數往回參照的句數|
-| INIT_LANGUAGE           | "zh"              | 決定初始語言，可設置為 "zh" 或 "en"|
+| INIT_LANGUAGE           | zh              | 決定初始語言，可設置為 "zh" 或 "en"|