Update Directory.Packages.props

Author: SimonCropp

src/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="CountryData" Version="6.13.0" />
     <PackageVersion Include="GeoJSON.Net" Version="1.4.1" />
     <PackageVersion Include="HtmlAgilityPack" Version="1.12.4" />
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.5" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.7" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.2" />
     <PackageVersion Include="NetTopologySuite" Version="2.6.0" />