Sidebar menu use ionic icons like 'desktop-outline' etc

I want to use ionicons on my sidebar, I tried configurations like

```
 icon: {
      icon: 'desktop-outline',
      pack: 'ion'
    },
```

but above configuration is not working. can anyone help?

look at versions:

    "ionicons": "^7.4.0",
     "@ionic/angular": "^6.7.5",
     "@nebular/theme": "11.0.1",
     "@angular/cli": "^15.2.10",
