Bump System.Text.Json in /src/JT1078.Gateway.Abstractions

Bumps System.Text.Json from 5.0.2 to 8.0.4.

---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-type: direct:production
...

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

src/JT1078.Gateway.Abstractions/JT1078.Gateway.Abstractions.csproj

@@ -28,6 +28,6 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="5.0.0" />
     <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="5.0.0" />
     <PackageReference Include="Microsoft.Extensions.Options" Version="5.0.0" />
-    <PackageReference Include="System.Text.Json" Version="5.0.2" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 </Project>