fix: typo in gpt-4 model (#741)

docs/get-start/faq.mdx

@@ -12,5 +12,5 @@ from embedchain.config import LlmConfig
 
 app = App()
 app.add("https://en.wikipedia.org/wiki/Elon_Musk")
-app.query("How many companies does Elon Musk run and name those?", config=LlmConfig(model="gpt-4))
+app.query("How many companies does Elon Musk run and name those?", config=LlmConfig(model="gpt-4"))
 ```