Update README.md (fix in the import example)

README.md

@@ -65,7 +65,7 @@ encoder = OpenAIEncoder()
 With our `decisions` and `encoder` defined we now create a `DecisionLayer`. The decision layer handles our semantic decision making.
 
 ```python
-from semantic_router import DecisionLayer
+from semantic_router.layer import DecisionLayer
 
 dl = DecisionLayer(encoder=encoder, decisions=decisions)
 ```
@@ -106,4 +106,4 @@ In this case, no decision could be made as we had no matches — so our decision
 
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 | --- | --- |
-| 🏃 [Walkthrough](https://colab.research.google.com/github/aurelio-labs/semantic-router/blob/main/walkthrough.ipynb) | Quickstart Python notebook |
+| 🏃 [Walkthrough](https://colab.research.google.com/github/aurelio-labs/semantic-router/blob/main/walkthrough.ipynb) | Quickstart Python notebook |