fix: fixed a spelling error

Author: ErikBjare

gptme/cli.py

@@ -35,7 +35,7 @@
 print_builtin = __builtins__["print"]  # type: ignore
 
 LLMChoice = Literal["openai", "local"]
-ModelChoice = Literal["gpt-3.5-turbo", "gpt4"]
+ModelChoice = Literal["gpt-3.5-turbo", "gpt-4"]
 
 
 script_path = Path(os.path.realpath(__file__))