chore(deps): bump System.Text.Json in /ManagedCode.FeatureChecker

Bumps System.Text.Json from 7.0.2 to 8.0.4.

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

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

Author: dependabot[bot]

ManagedCode.FeatureChecker/ManagedCode.FeatureChecker.csproj

@@ -17,7 +17,7 @@
     <ItemGroup>
         <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="7.0.0"/>
         <PackageReference Include="System.Collections.Immutable" Version="7.0.0"/>
-        <PackageReference Include="System.Text.Json" Version="7.0.2"/>
+        <PackageReference Include="System.Text.Json" Version="8.0.4"/>
     </ItemGroup>
 
 </Project>