fix(win11creator): update UI labels and screenshot (#5107)

- Update driver injection checkbox tooltip to describe individual package injection instead of a single DISM pass
- Make modification working label conditional so it displays 'Preparing setup media' when driver injection is disabled
- Update documentation screenshot to show the current 3-step wizard layout and vertical status log

functions/private/Invoke-WinUtilISO.ps1

@@ -356,7 +356,8 @@ function Invoke-WinUtilISOModify {
         Invoke-WPFUIThread -ScriptBlock {
             $sync["WPFWin11ISOModifyButton"].IsEnabled = $false
         }
-        Set-WinUtilISOStep -Step "Working" -Label "Modifying install.wim"
+        $workingLabel = if ($InjectDrivers) { "Modifying install.wim" } else { "Preparing setup media" }
+        Set-WinUtilISOStep -Step "Working" -Label $workingLabel
 
         $modified = $false
         try {

xaml/inputXML.xaml

@@ -1966,7 +1966,7 @@
                                                       Foreground="{DynamicResource MainForegroundColor}"
                                                       IsChecked="False"
                                                       Cursor="Hand"
-                                                      ToolTip="Stages boot-storage drivers for Setup and adds all exported drivers to the selected install.wim edition in one DISM pass."/>
+                                                      ToolTip="Injects boot-storage drivers for Setup and adds exported drivers to the selected install.wim edition individually, skipping incompatible packages."/>
                                         </StackPanel>
                                     </Border>