fix: missing char

lua/chatgpt_nvim/prompts.lua

@@ -510,7 +510,7 @@ local M = {
        - Whenever possible, provide references to relevant security standards, best practices, or guidelines (e.g., OWASP, NIST).  
 
     Please follow these guidelines to ensure the generated or explained code prioritizes security at every level, mitigating potential risks and maintaining best practices for building secure software.
-  ]]
+  ]],
   ["step-prompt"] = [[
     It appears this request might exceed the model's prompt character limit if done all at once.
     Please break down the tasks into smaller steps and handle them one by one.