Update PreviewPane.xaml

Author: yaira2

src/Files.App/UserControls/Pane/PreviewPane.xaml

@@ -289,7 +289,7 @@
 						SelectionMode="None">
 						<GridView.ItemsPanel>
 							<ItemsPanelTemplate>
-								<controls:WrapPanel Orientation="Horizontal" VerticalSpacing="0" />
+								<controls:WrapPanel Orientation="Horizontal" VerticalSpacing="-8" />
 							</ItemsPanelTemplate>
 						</GridView.ItemsPanel>