Update src/Workspaces/SharedUtilitiesAndExtensions/Workspace/Core/Extensions/DocumentExtensions.cs

Co-authored-by: NJason Malinowski <jason@jason-m.com>

src/Workspaces/SharedUtilitiesAndExtensions/Workspace/Core/Extensions/DocumentExtensions.cs

@@ -67,7 +67,7 @@ public static bool IsOpen(this Document document)
         /// <summary>
         /// Attempts to return an speculative semantic model for <paramref name="document"/> if possible if <paramref
         /// name="position"/> is contained within a method body in the tree.  Specifically, this will attempt to get an
-        /// existing cached semantic model <paramref name="document"/>.  If it can find one, and the top-level semantic
+        /// existing cached semantic model for <paramref name="document"/>.  If it can find one, and the top-level semantic
         /// version for this project matches the cached version, and the position is within a method body, then it will 
         /// be returned, just with the previous corresponding method body swapped out with the current method body.
         /// <para/>