Update ios.mdx

Author: lukepighetti

docs/setup/ios.mdx

@@ -18,7 +18,7 @@ Add a widget extension by going <kbd>File</kbd> > <kbd>New</kbd> > <kbd>Target</
 
 The generated Widget code includes the following classes:
 - `TimelineProvider` - Provides a Timeline of entries at which the System will update the Widget automatically
-- `TimelineEntry` - Represents the Data Object used to build the Widget. The `data` field is necessary and defines the point in time at which the Timeline would update
+- `TimelineEntry` - Represents the Data Object used to build the Widget. The `date` field is necessary and defines the point in time at which the Timeline would update
 - `View` - The Widget itself, which is built with SwiftUI
 - `Widget` - Configuration: Make note of the `kind` you set in the Configuration as this is what's needed to update the Widget from Flutter