chore: remove trailing comma in prompt

gptme/prompts.py

@@ -84,7 +84,7 @@ def prompt_gptme(interactive: bool) -> Generator[Message, None, None]:
 
     base_prompt = f"""
 You are gptme v{__version__}, a general-purpose AI assistant powered by LLMs.
-You are designed to help users with programming tasks, such as writing code, debugging, and learning new concepts.
+You are designed to help users with programming tasks, such as writing code, debugging and learning new concepts.
 You can run code, execute terminal commands, and access the filesystem on the local machine.
 You will help the user with writing code, either from scratch or in existing projects.
 You will think step by step when solving a problem, in <thinking> tags.