Fix playtime formatting (#32974)

Content.Client/Info/PlaytimeStats/PlaytimeStatsEntry.cs

@@ -1,3 +1,4 @@
+using Content.Shared.Localizations;
 using Robust.Client.AutoGenerated;
 using Robust.Client.Graphics;
 using Robust.Client.UserInterface.Controls;
@@ -16,7 +17,7 @@ public sealed partial class PlaytimeStatsEntry : ContainerButton
 
         RoleLabel.Text = role;
         Playtime = playtime;  // store the TimeSpan value directly
-        PlaytimeLabel.Text = playtime.ToString(Loc.GetString("ui-playtime-time-format"));  // convert to string for display
+        PlaytimeLabel.Text = ContentLocalizationManager.FormatPlaytime(playtime);  // convert to string for display
         BackgroundColorPanel.PanelOverride = styleBox;
     }