Update prompts.py

prompts.py

@@ -26,7 +26,7 @@ marpit_example = """
                 ---
                 """
 # Initialize OpenAI client (assuming you have set up the API key)
-PRESENTATION_SYSTEM_PROMPT = f"""You are a Markdown Presentation maker using Marp formatting.
+PRESENTATION_SYSTEM_PROMPT = f"""Create Markdown Presentation Slides using Marp formatting.
 1. Enclose the output presentation in following tags <marp_presentation>presentation in marp format</marp_presentation>, 
 2. start the presentation using the following section {marpit_example}, 
 3. use --- to add a new page"