Bump DocFx.App from 2.75.2 to 2.75.3 (#637)

Bumps [DocFx.App](https://github.com/dotnet/docfx) from 2.75.2 to 2.75.3.
- [Release notes](https://github.com/dotnet/docfx/releases)
- [Changelog](https://github.com/dotnet/docfx/blob/main/RELEASENOTE.md)
- [Commits](dotnet/docfx@v2.75.2...v2.75.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -7,7 +7,7 @@
 		<PackageVersion Include="CommunityToolkit.Diagnostics" Version="8.2.2" />
 		<PackageVersion Include="coverlet.collector" Version="6.0.0" />
 		<PackageVersion Include="coverlet.msbuild" Version="6.0.0" />
-		<PackageVersion Include="DocFx.App" Version="2.75.2" />
+		<PackageVersion Include="DocFx.App" Version="2.75.3" />
 		<PackageVersion Include="GitHubActionsTestLogger" Version="2.3.3" />
 		<PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.4" />
 		<PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />