[Docs]Update new-plugin-checklist.md to refer .NET 8 (#30927)

Co-authored-by: Parvez Khan <parvezkhan0802@gmail.com>

doc/devdocs/modules/launcher/new-plugin-checklist.md

@@ -31,7 +31,7 @@ public static string PluginID => "xxxxxxx"; // The part xxxxxxx stands for the p
 - [ ] Plugin's output code and assets have to be included in the installer [`Product.wxs`](/installer/PowerToysSetup/Product.wxs)
 - [ ] Test the plugin with a local build. Build the installer, install, check that the plugin works as expected
 - [ ] All plugin's binaries have to be included in the signed build [`pipeline.user.windows.yml`](/.pipelines/pipeline.user.windows.yml)
-- [ ] The plugin target framework has to be .NET Core 3.1. All dependencies have to have .NET 5 version
+- [ ] The plugin target framework has to be net8.0-windows. All dependencies should be compatible with .NET 8.
 
 Some localization steps can only be done after the first pass by the localization team to provide the localized resources.
 In the PR that adds a new plugin, reference a new issue to track the work for fully enabling localization for the new plugin.