Bump System.Text.Json from 8.0.3 to 8.0.4 in /src

Bumps System.Text.Json from 8.0.3 to 8.0.4.

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

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

Directory.Packages.props

@@ -116,7 +116,7 @@
     <PackageVersion Include="System.Reactive.Async" Version="6.0.0-alpha.18" />
     <PackageVersion Include="System.ServiceModel.Primitives" Version="8.0.0" />
     <PackageVersion Include="System.Text.Encodings.Web" Version="8.0.0" />
-    <PackageVersion Include="System.Text.Json" Version="8.0.3" />
+    <PackageVersion Include="System.Text.Json" Version="8.0.4" />
     <PackageVersion Include="Testcontainers" Version="3.8.0" />
     <PackageVersion Include="Ulid" Version="1.3.3" />
     <PackageVersion Include="Wasmtime" Version="19.0.1" />