Update quickstart.mdx (#12386)

**Description**
Removed confusing sentence. 
Not clear what "both" was referring to. The two required components
mentioned previously? The two methods listed below?

---------

Co-authored-by: Erick Friis <erick@langchain.dev>

docs/docs/get_started/quickstart.mdx

@@ -83,7 +83,9 @@ LangChain provides several objects to easily distinguish between different roles
 If none of those roles sound right, there is also a `ChatMessage` class where you can specify the role manually.
 For more information on how to use these different messages most effectively, see our prompting guide.
 
-LangChain provides a standard interface for both, but it's useful to understand this difference in order to construct prompts for a given language model.
+Langchain provides a common interface that's shared by both LLMs and ChatModels. 
+However it's useful to understand this difference in order to construct prompts for a given language model.
+
 The standard interface that LangChain provides has two methods:
 - `predict`: Takes in a string, returns a string
 - `predict_messages`: Takes in a list of messages, returns a message.
@@ -157,7 +159,7 @@ prompt = PromptTemplate.from_template("What is a good name for a company that ma
 prompt.format(product="colorful socks")
 ```
 
-```pycon
+```python
 What is a good name for a company that makes colorful socks?
 ```