Bump MarkdownSnippets.MsBuild from 28.3.0 to 28.3.1

---
updated-dependencies:
- dependency-name: MarkdownSnippets.MsBuild
  dependency-version: 28.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -12,7 +12,7 @@
     <PackageVersion Include="Fixie" Version="4.2.0" />
     <PackageVersion Include="Fixie.TestAdapter" Version="4.2.0" />
     <PackageVersion Include="FSharp.Core" Version="11.0.100" />
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.3.0" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.3.1" />
     <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.9" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" Pinned="true" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0" Pinned="true" />