prompt: modify gen ai prompt to output in html tag instead of markdown

inference_api.py

@@ -654,7 +654,8 @@ def trigger_gemini_explanation(skills: List[str], preference: str, question: Opt
         "The response MUST focus heavily on solving this specific question step-by-step "
         f"using their hobby (\"{preference}\") as a creative analogy, theme, or context to make it highly engaging and easy to understand. "
         "If the question requires step-by-step mathematical problem solving, show the clear step-by-step calculations. "
-        "Keep the overall response extremely concise and strictly under 10 lines total."
+        "Keep the overall response extremely concise and strictly under 10 lines total. "
+        "Format the output strictly using HTML tags (e.g., <em> for italics, <b> for bold, <br> for newlines) instead of Markdown."
     )
     
     logger.info(f"[Gemini Prompt]\n{prompt}")