Update SimpleIcons to v15.18.0 (#385)

Update SimpleIcons to v15.18.0

Author: punker76

README.md

@@ -33,7 +33,7 @@ The same icons are also available for [Avalonia](https://avaloniaui.net/ with th
 
 | Icon collection | Version | ∑ | NuGet |
 |---|--:|--:|:--|
-| Complete IconPacks collection with all Icons in one package | | 69302 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.svg?style=flat-square&&label=IconPacks"></a> |
+| Complete IconPacks collection with all Icons in one package | | 69328 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.svg?style=flat-square&&label=IconPacks"></a> |
 | [Bootstrap Icons](https://icons.getbootstrap.com/) | 1.13.1 | 2078 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.BootstrapIcons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.BootstrapIcons.svg?style=flat-square&&label=BootstrapIcons"></a> |
 | [Boxicons v2](https://v2.boxicons.com/) | 2.1.4 | 1634 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.BoxIcons2/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.BoxIcons2.svg?style=flat-square&&label=BoxIcons2"></a> |
 | [Boxicons v3](https://boxicons.com/) | 3.0.0 | 3584 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.BoxIcons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.BoxIcons.svg?style=flat-square&&label=BoxIcons"></a> |
@@ -70,7 +70,7 @@ The same icons are also available for [Avalonia](https://avaloniaui.net/ with th
 | [Radix Icons](https://github.com/radix-ui/icons) | 1.3.0 | 324 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.RadixIcons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.RadixIcons.svg?style=flat-square&&label=RadixIcons"></a> |
 | [Remix Icon](https://remixicon.com/) | 4.7.0 | 3135 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.RemixIcon/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.RemixIcon.svg?style=flat-square&&label=RemixIcon"></a> |
 | [RPG Awesome](http://nagoshiashumari.github.io/Rpg-Awesome/) | 0.2.0 | 495 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.RPGAwesome/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.RPGAwesome.svg?style=flat-square&&label=RPGAwesome"></a> |
-| [Simple Icons](https://github.com/simple-icons/simple-icons) | 15.10.0 | 3343 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.SimpleIcons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.SimpleIcons.svg?style=flat-square&&label=SimpleIcons"></a> |
+| [Simple Icons](https://github.com/simple-icons/simple-icons) | 15.18.0 | 3369 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.SimpleIcons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.SimpleIcons.svg?style=flat-square&&label=SimpleIcons"></a> |
 | [Typicons](https://www.s-ings.com/typicons/) | 2.1.2 | 336 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.Typicons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.Typicons.svg?style=flat-square&&label=Typicons"></a> |
 | [Unicons](https://github.com/Iconscout/unicons) | 4.2.0 | 1610 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.Unicons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.Unicons.svg?style=flat-square&&label=Unicons"></a> |
 | [Vaadin Icons](https://vaadin.com/icons) | 24.8.4 | 636 | <a href="https://www.nuget.org/packages/MahApps.Metro.IconPacks.VaadinIcons/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/nuget/dt/MahApps.Metro.IconPacks.VaadinIcons.svg?style=flat-square&&label=VaadinIcons"></a> |