Update gitleaks.yaml

Author: Edberg-Vasan

.github/workflows/gitleaks.yaml

@@ -21,7 +21,7 @@ jobs:
        continue-on-error: true
      - name: Setup NuGet.exe
        if: steps.gitleaks.outcome != 'success'
-       uses: nuget/setup-nuget@v1
+       uses: nuget/setup-nuget@v2.0.0
        with:
           nuget-version: latest
      - name: Install the dotnet