Update GraphQL packages to 8.8.0 (OrchardCMS#18581)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Directory.Packages.props

@@ -19,10 +19,10 @@
     <PackageVersion Include="DocumentFormat.OpenXml" Version="3.3.0" />
     <PackageVersion Include="Elastic.Clients.Elasticsearch" Version="8.19.13" />
     <PackageVersion Include="Fluid.Core" Version="2.31.0" />
-    <PackageVersion Include="GraphQL" Version="8.7.0" />
-    <PackageVersion Include="GraphQL.DataLoader" Version="8.7.0" />
-    <PackageVersion Include="GraphQL.MicrosoftDI" Version="8.7.0" />
-    <PackageVersion Include="GraphQL.SystemTextJson" Version="8.7.0" />
+    <PackageVersion Include="GraphQL" Version="8.8.0" />
+    <PackageVersion Include="GraphQL.DataLoader" Version="8.8.0" />
+    <PackageVersion Include="GraphQL.MicrosoftDI" Version="8.8.0" />
+    <PackageVersion Include="GraphQL.SystemTextJson" Version="8.8.0" />
     <PackageVersion Include="Jint" Version="4.4.2" />
     <PackageVersion Include="JsonPath.Net" Version="2.1.1" />
     <PackageVersion Include="HtmlSanitizer" Version="9.1.878-beta" />