Bump System.Net.Http.Json from 8.0.1 to 9.0.4 in the system group

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


Updates `System.Net.Http.Json` 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.Net.Http.Json
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: system
...

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

Author: dependabot[bot]

src/WhatsApp/WhatsApp.csproj

@@ -21,7 +21,7 @@
     <PackageReference Include="NuGetizer" Version="1.2.4" />
     <PackageReference Include="Devlooped.JQ" Version="1.7.1.8" PackExclude="contentFiles" />
     <PackageReference Include="PolySharp" Version="1.15.0" />
-    <PackageReference Include="System.Net.Http.Json" Version="8.0.1" />
+    <PackageReference Include="System.Net.Http.Json" Version="9.0.4" />
   </ItemGroup>
 
   <ItemGroup>