Bump System.Configuration.ConfigurationManager

Bumps [System.Configuration.ConfigurationManager](https://github.com/dotnet/runtime) from 8.0.1 to 9.0.4.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.1...v9.0.4)

---
updated-dependencies:
- dependency-name: System.Configuration.ConfigurationManager
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

src/NHapi.SourceGeneration/NHapi.SourceGeneration.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
@@ -15,7 +15,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Configuration.ConfigurationManager" Version="9.0.3" />
+    <PackageReference Include="System.Configuration.ConfigurationManager" Version="9.0.4" />
     <PackageReference Include="System.Data.OleDb" Version="9.0.3" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118">
       <PrivateAssets>all</PrivateAssets>