Update src/routes/reference/components/error-boundary.mdx

Co-authored-by: Sarah <gerrardsarah@gmail.com>

Author: amirhhashemi

src/routes/reference/components/error-boundary.mdx

@@ -23,7 +23,7 @@ For instance:
 **Type**: `JSX.Element | ((err: any, reset: () => void) => JSX.Element)`
 
 The content to display when an error occurs.
-If `fallback` is a function, it receives two parameters:
+If a function is passed, it receives two parameters:
 
 - `err`: The caught error object.
 - `reset`: A function that forces the `<ErrorBoundary>` to re-render its children and clear the error state.