Update Directory.Build.props

Author: wieslawsoltes

Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
     <VersionPrefix>11.0.0</VersionPrefix>
-    <VersionSuffix>preview7</VersionSuffix>
+    <VersionSuffix>preview8</VersionSuffix>
     <Authors>Wiesław Šoltés</Authors>
     <Company>Wiesław Šoltés</Company>
     <Copyright>Copyright © Wiesław Šoltés 2023</Copyright>
@@ -12,7 +12,7 @@
     <LangVersion>latest</LangVersion>
   </PropertyGroup>
   <PropertyGroup>
-    <AvaloniaVersion>11.0.0-preview7</AvaloniaVersion>
+    <AvaloniaVersion>11.0.0-preview8</AvaloniaVersion>
     <RiveRiveSharpVersion>1.0.5-alpha.ddf1abfd2</RiveRiveSharpVersion>
   </PropertyGroup>
 </Project>