Bump MarkdownSnippets.MsBuild from 25.1.0 to 26.0.0 in /src

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
...

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

src/Tests/Tests.csproj

@@ -4,7 +4,7 @@
     <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="MarkdownSnippets.MsBuild" Version="25.1.0" PrivateAssets="all" />
+    <PackageReference Include="MarkdownSnippets.MsBuild" Version="26.0.0" PrivateAssets="all" />
     <PackageReference Include="Argon" Version="0.14.0" />
     <PackageReference Include="Xunit" Version="2.6.2" />
     <PackageReference Include="XunitContext" Version="3.3.1" />