Fix formatting in product.ts to satisfy hygiene check

Remove trailing whitespace on the blank line after the
enableExtensionGalleryEntraAuth property, which tripped the
Compile & Hygiene CI check (File not formatted).

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: fe244b45-6362-4563-880d-fa3d9a27a07c

Author: mcumming

src/vs/base/common/product.ts

@@ -160,7 +160,7 @@ export interface IProductConfiguration {
 	 * publicly released, independent of any admin policy configuration.
 	 */
 	readonly enableExtensionGalleryEntraAuth?: boolean;
-  
+
 	readonly dictationRuntime?: IDictationRuntimeProductConfig;
 
 	readonly mcpGallery?: {