fix: correct #visibleReroutes to _visibleReroutes typo (#8597)

Fixes build failure on main caused by merge conflict typo.

- `#visibleReroutes` → `_visibleReroutes` on line 5644 of
LGraphCanvas.ts

Fixes
https://github.com/Comfy-Org/ComfyUI_frontend/actions/runs/21653103679/job/62422017295

<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

* **Refactor**
  * Internal code style adjustment with no user-facing impact.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8597-fix-correct-visibleReroutes-to-_visibleReroutes-typo-2fd6d73d365081ce9202d070f80fc5c3)
by [Unito](https://www.unito.io)

src/lib/litegraph/src/LGraphCanvas.ts

@@ -5641,7 +5641,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
     // Skip link rendering while waiting for slot positions to sync after reconfigure
     if (LiteGraph.vueNodesMode && layoutStore.pendingSlotSync) {
-      this.#visibleReroutes.clear()
+      this._visibleReroutes.clear()
       return
     }