fix formatting

Signed-off-by: Tony Chia <tchia04@gmail.com>

docs/getting-started/getting-started.md

@@ -169,8 +169,7 @@ If you get the following error message, please make sure to add some credits to
 
 You can find the instruction on how to do that at https://help.openai.com/en/articles/8264644-how-can-i-set-up-prepaid-billing
 
-<pre>
+`
 Error: exhausted API quota for AI provider openai: error, status code: 429, message: You exceeded your current quota, please check your plan and billing details. For more information on this error, read the docs: https://platform.openai.com/docs/guides/error-codes/api-errors.
-</pre>
-
+`
 ---