Bump System.Text.Json from 6.0.0 to 8.0.0 in /src/code (#1475)

Author: dependabot[bot]

src/code/Microsoft.PowerShell.PSResourceGet.csproj

@@ -22,7 +22,7 @@
     <PackageReference Include="NuGet.Protocol" Version="6.7.0" />
     <PackageReference Include="PowerShellStandard.Library" Version="7.0.0-preview.1" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
-    <PackageReference Include="System.Text.Json" Version="6.0.0" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
   </ItemGroup>