fix(core): subscribe search not unsubscribe (#11929)

blocksuite/affine/widgets/linked-doc/src/linked-doc-popover.ts

@@ -249,6 +249,7 @@ export class LinkedDocPopover extends SignalWatcher(
   override disconnectedCallback() {
     super.disconnectedCallback();
     this._menusItemsEffectCleanup();
+    this._updateLinkedDocGroupAbortController?.abort();
   }
 
   override render() {