Update ManageVariantIdentifiers breadcrumb to match correct page #1 (#2274)

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-->

## Summary by CodeRabbit

* **Bug Fixes**
* Corrected breadcrumb navigation in the Product Variant admin area.
When managing variant identifiers, the final breadcrumb now links to the
Identifiers page instead of Inventory, aligning with the page context.
This improves navigation accuracy and consistency across the admin
interface, reducing confusion for users. No changes to data or
functionality—only the breadcrumb destination was updated wherever this
breadcrumb appears.

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

Author: marvinlinthorst

packages/admin/src/Filament/Resources/ProductVariantResource/Pages/ManageVariantIdentifiers.php

@@ -41,7 +41,7 @@ public function getBreadcrumbs(): array
             ...ProductVariantResource::getBaseBreadcrumbs(
                 $this->getRecord()
             ),
-            ProductVariantResource::getUrl('inventory', [
+            ProductVariantResource::getUrl('identifiers', [
                 'record' => $this->getRecord(),
             ]) => $this->getTitle(),
         ];