Updated TypeSpec Conversion (markdown)

TypeSpec-Conversion.md

@@ -4,3 +4,13 @@ Short link: [aka.ms/typespec/conversion]
 
 [aka.ms/typespec/conversion]: https://aka.ms/typespec/conversion
 
+## Overview
+
+1. Identify the OpenAPI spec version to convert
+   * Must be newest version for which SDKs have been generated, regardless of whether it was a `stable` or `preview` version
+
+2. Choose a new preview version for the OpenAPI generated from TypeSpec
+   * Example: `preview/2024-07-01-preview`
+
+3. 
+