Bump Xunit from 2.6.2 to 2.6.3 in /src

Bumps [Xunit](https://github.com/xunit/xunit) from 2.6.2 to 2.6.3.
- [Commits](xunit/xunit@2.6.2...2.6.3)

---
updated-dependencies:
- dependency-name: Xunit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/ConfigReader.Tests/ConfigReader.Tests.csproj

@@ -9,7 +9,7 @@
     <PackageReference Include="Verify.DiffPlex" Version="2.3.0" />
     <PackageReference Include="Verify.Xunit" Version="22.8.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.4" PrivateAssets="All" />
-    <PackageReference Include="Xunit" Version="2.6.2" />
+    <PackageReference Include="Xunit" Version="2.6.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="ProjectDefaults" Version="1.0.106" PrivateAssets="all" />
     <None Update="allConfig.json">

src/MarkdownSnippets.Tool.Tests/MarkdownSnippets.Tool.Tests.csproj

@@ -8,7 +8,7 @@
     <PackageReference Include="Verify.DiffPlex" Version="2.3.0" />
     <PackageReference Include="Verify.Xunit" Version="22.8.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.4" PrivateAssets="All" />
-    <PackageReference Include="Xunit" Version="2.6.2" />
+    <PackageReference Include="Xunit" Version="2.6.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <ProjectReference Include="..\MarkdownSnippets.Tool\MarkdownSnippets.Tool.csproj" />
     <ProjectReference Include="..\MarkdownSnippets\MarkdownSnippets.csproj" />