Added order by for department for visitor page

app/Filament/Resources/VisitorEntryResource.php

@@ -118,6 +118,7 @@ class VisitorEntryResource extends Resource
                     ->label('Employee Department')
                     ->options(
                         EmployeeMaster::distinct()
+                            ->orderBy('department')
                             ->pluck('department', 'department')
                     )
                     ->searchable()