Bump System.Text.Json from 9.0.0 to 9.0.1 in the system group

Bumps the system group with 1 update: [System.Text.Json](https://github.com/dotnet/runtime).


Updates `System.Text.Json` from 9.0.0 to 9.0.1
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.0...v9.0.1)

---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: system
...

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

ImGuiWidgetsDemo/ImGuiWidgetsDemo.csproj

@@ -8,7 +8,7 @@
     <PackageReference Include="ktsu.ImGuiPopups" Version="1.0.0-alpha.86" />
     <PackageReference Include="Microsoft.DotNet.ILCompiler" Version="9.0.0" />
     <PackageReference Include="Microsoft.NET.ILLink.Tasks" Version="9.0.0" />
-    <PackageReference Include="System.Text.Json" Version="9.0.0" />
+    <PackageReference Include="System.Text.Json" Version="9.0.1" />
   </ItemGroup>
 
   <ItemGroup>