Bump Microsoft.Extensions.Hosting in /src/DependencyGraph.App

Bumps [Microsoft.Extensions.Hosting](https://github.com/dotnet/runtime) from 9.0.3 to 9.0.4.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.3...v9.0.4)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Hosting
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/DependencyGraph.App/DependencyGraph.App.csproj

@@ -29,7 +29,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.3" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.4" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>