Add range to config desc

Author: Tyriar

src/vs/workbench/contrib/accessibility/browser/accessibilityContribution.ts

@@ -71,7 +71,7 @@ const configuration: IConfigurationNode = {
 			...baseProperty
 		},
 		[AccessibilitySettingId.UnfocusedViewOpacity]: {
-			description: localize('unfocusedViewOpacity', 'The opacity percentage to use for unfocused editors and terminals.'),
+			description: localize('unfocusedViewOpacity', 'The opacity percentage (0.0 to 1.0) to use for unfocused editors and terminals.'),
 			type: 'number',
 			default: 1,
 			tags: ['accessibility']