fix: correct import path for Lumo icons in breadcrumb styles

Update imports from '@vaadin/vaadin-lumo-styles/font-icons.js' to
'@vaadin/vaadin-lumo-styles/icons.js' to fix module resolution errors.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Artur-

packages/breadcrumb/src/styles/vaadin-breadcrumb-item-styles.js

@@ -4,7 +4,7 @@
  * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
  */
 import '@vaadin/component-base/src/styles/style-props.js';
-import '@vaadin/vaadin-lumo-styles/font-icons.js';
+import '@vaadin/vaadin-lumo-styles/icons.js';
 import { css } from 'lit';
 
 export const breadcrumbItemStyles = css`

packages/breadcrumb/src/styles/vaadin-breadcrumb-styles.js

@@ -4,7 +4,7 @@
  * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
  */
 import '@vaadin/component-base/src/styles/style-props.js';
-import '@vaadin/vaadin-lumo-styles/font-icons.js';
+import '@vaadin/vaadin-lumo-styles/icons.js';
 import { css } from 'lit';
 
 export const breadcrumbStyles = css`