Update to latest patch of GitVersion

This is a build-time dependency and doesn't impact consumers of NuGet packages.

Author: JeremyCaney

OnTopic.Editor.AspNetCore.Attributes/OnTopic.Editor.AspNetCore.Attributes.csproj

@@ -13,7 +13,7 @@
 
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="GitVersion.MsBuild" Version="5.6.7">
+    <PackageReference Include="GitVersion.MsBuild" Version="5.6.8">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

OnTopic.Editor.AspNetCore/OnTopic.Editor.AspNetCore.csproj

@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="GitVersion.MsBuild" Version="5.6.7">
+    <PackageReference Include="GitVersion.MsBuild" Version="5.6.8">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>