Bump System.CodeDom from 9.0.3 to 9.0.4 (#287)

Bumps [System.CodeDom](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: System.CodeDom
  dependency-version: 9.0.4
  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]

src/Directory.Packages.props

@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageVersion Include="Akka.Cluster.TestKit" Version="1.5.39" />
     <PackageVersion Include="TeamCity.ServiceMessages" Version="4.1.1" />
-    <PackageVersion Include="System.CodeDom" Version="9.0.3" />
+    <PackageVersion Include="System.CodeDom" Version="9.0.4" />
     <PackageVersion Include="System.Runtime.Loader" Version="4.3.0" />
     <PackageVersion Include="xunit.runner.utility" Version="2.8.1" />
   </ItemGroup>