Fixes https://github.com/MicrosoftDocs/azure-docs/issues/108207

Author: ggailey777

articles/azure-functions/functions-bindings-warmup.md

@@ -251,7 +251,7 @@ The following considerations apply to using a warmup function in C#:
 
 # [Isolated process](#tab/isolated-process)
 
-- Your function must be named `warmup` (case-insensitive) using the `FunctionName` attribute.
+- Your function must be named `warmup` (case-insensitive) using the `Function` attribute.
 - A return value attribute isn't required.
 - You can pass an object instance to the function.