Bump System.Configuration.ConfigurationManager from 10.0.3 to 10.0.4

---
updated-dependencies:
- dependency-name: System.Configuration.ConfigurationManager
  dependency-version: 10.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

OpenXmlPowerToolsExamples/MarkupSimplifierApp/MarkupSimplifierApp.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Configuration.ConfigurationManager" Version="10.0.3" />
+    <PackageReference Include="System.Configuration.ConfigurationManager" Version="10.0.4" />
   </ItemGroup>
 
   <ItemGroup>