fix longpath for ci-validation2

Author: dotnetprog

.github/workflows/ci-pipeline-validation.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: git configure long path
-      run: git config --global core.longpaths tru
+      run: git config --global core.longpaths true
     - uses: actions/checkout@v3
     - name: Setup .NET
       uses: actions/setup-dotnet@v3