Update release.yml

Author: ChrisPulman

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
       dotNetBuild: true
       useVisualStudioPreview: false
       useMauiCheckDotNetTool: false
-      solutionFile: "reactiveui.sln"
+      solutionFile: "ReactiveUI.Maui.Plugins.Popup.sln"
     secrets:
       SIGN_CLIENT_USER_ID: ${{ secrets.SIGN_CLIENT_USER_ID }}
       SIGN_CLIENT_SECRET: ${{ secrets.SIGN_CLIENT_SECRET }}