Bump MarkdownSnippets.MsBuild from 25.1.0 to 26.0.0 (#693)

Bumps [MarkdownSnippets.MsBuild](https://github.com/SimonCropp/MarkdownSnippets) from 25.1.0 to 26.0.0.
- [Release notes](https://github.com/SimonCropp/MarkdownSnippets/releases)
- [Commits](https://github.com/SimonCropp/MarkdownSnippets/commits)

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

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Directory.Packages.props

@@ -3,7 +3,7 @@
     <PackageVersion Include="BenchmarkDotNet" Version="0.13.10" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.0" />
     <PackageVersion Include="GitHubActionsTestLogger" Version="2.3.3" />
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="25.1.0" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="26.0.0" />
     <PackageVersion Include="MartinCostello.Logging.XUnit" Version="0.3.0" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.0" />
     <PackageVersion Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />