Update file-drop-manager.ts

Fix

Author: doouding

blocksuite/affine/components/src/drag-indicator/file-drop-manager.ts

@@ -198,10 +198,9 @@ export class FileDropExtension extends LifeCycleWatcher {
 
     std.event.disposables.add(
       this.dropTarget$.subscribe(target => {
-        if (this._disableIndicator) return;
         FileDropExtension.indicator.rect = this._disableIndicator
-          ? (target?.rect ?? null)
-          : null;
+          ? null
+          : (target?.rect ?? null);
       })
     );