build: Update System.Text.Json to fix vulnerability

Author: NelsonBN

samples/PowerUtils.AspNetCore.ErrorHandler.Samples/Samples.csproj

@@ -21,6 +21,7 @@
     <PackageReference Include="Serilog.Exceptions" Version="8.4.0+build.694" />
     <PackageReference Include="Serilog.Enrichers.Environment" Version="2.3.0" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="7.6.0" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" /> <!-- Update directly to fix vulnerability https://github.com/advisories/GHSA-hh2w-p6rv-4g7w -->
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net7.0' ">

tests/PowerUtils.AspNetCore.ErrorHandler.Tests/PowerUtils.AspNetCore.ErrorHandler.Tests.csproj

@@ -44,6 +44,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="System.Text.Json" Version="8.0.4" /> <!-- Update directly to fix vulnerability https://github.com/advisories/GHSA-hh2w-p6rv-4g7w -->
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net8.0' ">