Merge pull request #279692 from lgayhardt/patch-268

move migration section index-lookup-tool.md

Author: prmerger-automator[bot]

articles/ai-studio/how-to/prompt-flow-tools/index-lookup-tool.md

@@ -21,6 +21,7 @@ The prompt flow Index Lookup tool enables the use of common vector indices (such
 
 ## Build with the Index Lookup tool
 
+1. If you have a flow that contains one of the deprecated legacy index tools ( the Vector Index Lookup tool, Vector DB Lookup tool, and Faiss Index Lookup tool) you will first need to [upgrade your flow](#upgrade-your-tools).
 1. Create or open a flow in [Azure AI Studio](https://ai.azure.com). For more information, see [Create a flow](../flow-develop.md).
 1. Select **+ More tools** > **Index Lookup** to add the Index Lookup tool to your flow.
 
@@ -140,7 +141,6 @@ The following JSON format response is an example returned by the tool that inclu
 ]
 
 ```
-
 ## Migrate from legacy tools to the Index Lookup tool
 
 The Index Lookup tool looks to replace the three deprecated legacy index tools: the Vector Index Lookup tool, the Vector DB Lookup tool, and the Faiss Index Lookup tool.