Update dependency GitVersion.MsBuild to 6.6.1

Author: renovate[bot]

Directory.Packages.props

@@ -7,7 +7,7 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.102" />
     <PackageVersion Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.14.15" />
     <PackageVersion Include="IDisposableAnalyzers" Version="4.0.8" />
-    <PackageVersion Include="GitVersion.MsBuild" Version="6.5.1" />
+    <PackageVersion Include="GitVersion.MsBuild" Version="6.6.1" />
 
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="NSubstitute.Analyzers.CSharp" Version="1.0.17" />