fix: prevents exposing initial grade in feedback (#25)

Signed-off-by: Anthony D. Mays <[email protected]>

Author: anthonydmays

lib/javascript/grader/src/main.ts

@@ -478,7 +478,7 @@ Guidelines:
 - Be fair but thorough in your assessment
 - Provide constructive feedback
 - Consider both what was implemented and how well it was implemented
-- Reference specific aspects from the grading criteria
+- Reference specific aspects from the grading criteria, but DO NOT include score in the feedback
 - Keep feedback concise but helpful`;
 
     const response = UrlFetchApp.fetch("https://api.openai.com/v1/chat/completions", {